Upgrading Software Issue. - AT&T HTC One (M8)

Software up to date issue
HI all, just got this M8 and it is an ATT Version. but I believe it is unlocked because I am using it with cricket.
When trying to update Android Tells me software is up to date ?
Android version 5.0.2
HTC Sense Version 6.0
Software Number 4.28.502.1
HTC SDK API Level
I am pretty sure that ATT has updated to Marshmallow by now / So why can't I update? I am on wifi and 4G/LTE Could it be because I am using a Cricket Sim Card in the Phone ?
I have downloaded the RUU for Marshmallow software version 6.20.502.5. Should I continue with the Manual update ?
I believe this phone was originally purchased from ATT on May of 2016 if it makes any difference , figured I post it. since it could be a newer version of HTC M8.
Also is there a way to back up my current stock rom, without Rooting phone ? Thanks for all your help.
As I cannot root my phone, because when I go into developer option and search for S-off That option is not there and I can't Continue.

My responses below in red font:
ELEVO said:
HI all, just got this M8 and it is an ATT Version. but I believe it is unlocked because I am using it with cricket.
When trying to update Android Tells me software is up to date ?
I am pretty sure that ATT has updated to Marshmallow by now / So why can't I update? I am on wifi and 4G/LTE Could it be because I am using a Cricket Sim Card in the Phone ?
That is correct, the AT&t version (and most US versions) can only OTA update if connected to the proper branded carrier (AT&T in this case). Therefore, the RUU is your best option to update.
I have downloaded the RUU for Marshmallow software version 6.20.502.5. Should I continue with the Manual update ?
You can. But you need to flash the 6.20.502.5 firmware first, before you can flash the RUU. See instructions to flash the firmware here: https://forum.xda-developers.com/showpost.php?p=67123738&postcount=7
Then run the RUU. Keep in mind, that RUU will wipe the phone. So backup your data to an off-phone location (cloud, computer, etc.) before RUU.
Also is there a way to back up my current stock rom, without Rooting phone ? The current Lollipop ROM? No, there will be no way to revert to LP by official means, once you RUU to Marshmallow. I doubt you will find the need or desire to "downgrade" to obsolete LP version. If for some reason you did want to, there are options, but would require unlocking the bootloader (to install custom recovery and flash a Lollipop ROM), or s-off (which would allow you to "downgrade" by RUU - which is not allowed with s-on).
As I cannot root my phone, because when I go into developer option and search for S-off That option is not there and I can't Continue.
You are misunderstanding a couple things:
1) s-off is not a setting in Developer Options. s-off can only be obtained with sunshine app ($25)
2) You don't need s-off to root this device. Simply unlock the bootloader, install TWRP, and flash SuperSU to root
Click to expand...
Click to collapse

Detailed
redpoint73 said:
My responses below in red font:
Click to expand...
Click to collapse
Thanks for the detailed reply, really helpful and greatly appreciated :good:
Two more Questions, Can I upgrade to an official DEV Edition RUU on this ATT Device? or would I have to use a Custom Dev ROM ? as I am trying to Tether with my phone, just like my official Developer HTC M8 I purchased in 2014 , Seems AT&T phone wont allow me to Tether ?
Also once I flash firmware and upgrade to official RUU will need to Unlock and Root Loader? Will doing upgrading to official Marshmallow Relock bootloader and Un Root Phone ? Back to Stock ? Thanks again, I will be attempting this pretty soon. Thanks again
For the Record, I have made a back up of my Lollipop via TWRK. I also backed it up using Titanium back up, just in case.

Again, my responses in red font:
ELEVO said:
Thanks for the detailed reply, really helpful and greatly appreciated :good:
You're welcome. Always happy to help!
Two more Questions, Can I upgrade to an official DEV Edition RUU on this ATT Device?
You can't flash the Dev Edition RUU with s-on. Even though the versions are very similar (same model ID - MID) the two versions have different carrier ID (CID). Wrong carrier ID will make the Dev Ed RUU fail, by definition. And the only way to change CID is with s-off. Further, its not really necessary to flash the Dev Ed RUU (and not worth spending money of s-off) to accomplish what you want (see more below)
or would I have to use a Custom Dev ROM ? as I am trying to Tether with my phone, just like my official Developer HTC M8 I purchased in 2014 , Seems AT&T phone wont allow me to Tether ?
Its correct that the AT&T stock ROM disables tethering. Flashing most custom ROMs (or the Dev Ed ROM) will enable tethering - as well as remove annoying AT&T branding and bloat apps. Flashing the Dev Ed RUU is not necessary to accomplish this.
Also once I flash firmware and upgrade to official RUU will need to Unlock and Root Loader? Will doing upgrading to official Marshmallow Relock bootloader and Un Root Phone ? Back to Stock ? Thanks again, I will be attempting this pretty soon. Thanks again
You need to relock the bootloader in order to flash firmware and RUU (command: fastboot oem lock). Once the RUU is complete, the phone will be on a fully stock "factory" image. So you will be unrooted. You will also be back to stock recovery (no longer have TWRP installed). From there, what you want to do:
1) Unlock the bootloader again. Either use the same unlock bin code you used to unlock BL before. Or get a new code from HTCDev.com
2) Flash TWRP back to the phone with fastboot. TWRP 3.0.2 is recommended for compatibility with MM firmware.
3) Flash the desired custom ROM. The custom ROM will be rooted (if you flash the Dev Ed ROM, you can select root in the AROMA installer).
For the Record, I have made a back up of my Lollipop via TWRK. I also backed it up using Titanium back up, just in case.
Always good to make backups. Although be aware, that RUU will wipe the phone, including internal storage. So if you picked internal storage as your backup location, you'll want to move/copy to another location (removable SD is okay, otherwise to computer or cloud).
Also note that restoring app data (as well as call logs, SMS) using Titanium, after RUU or ROM flash should be okay. But don't restore any system data, as this can cause problems.
Click to expand...
Click to collapse

redpoint73 said:
Again, my responses in red font:
Click to expand...
Click to collapse
Ok i came back to this old post. I forgot all about it, it really is helping me alot.
My questioin is after i Relock the bootloader can i do a factory wipe? will this remove everything from my phone and bring it back to stock?
I relocked my phone, but all my apps and contacts are their.

Bricked ?
ELEVO said:
Ok i came back to this old post. I forgot all about it, it really is helping me alot.
My questioin is after i Relock the bootloader can i do a factory wipe? will this remove everything from my phone and bring it back to stock?
I relocked my phone, but all my apps and contacts are their.
Click to expand...
Click to collapse
I think i may have bricked my phone? I went and installed an RUU firmware file for Marshmallow as most instruct to do via Fastboot. All went well, installation completed and i was able to send command to phone to reboot. when it tried to reboot. white screen with HTC Comes on and then goes almost black with a very light dark grey background.
Phone would not reboot into anything but dark screen. even when i restarted it with power button. the only thing that worked for me, was Holding Down Power/Volume and quickly hit the volume down button before device would vibrate to reboot, that took me into recovery. Below is what i see in Recovery.
Phone now has new software
***RELOCKED***
m8_UL_CA PVT SHIP S-ON
HBOOT-3.1.0.0000
RADIO-4.0 [email protected]
OpenDSP-V56.2.2-00593-M8974_FO.0126
0S-6.20.502.5
eMMC-boot 2048MB
APR 14 2016,19:39:46.0
HBOOT
<Vol UP> to previous item
<Vol Down> to next item
<Power> to select item
FASTBOOT
RECOVERY
FACTORY RESET
SIMLOCK
CHECK SMARTSD
IMAGE CRC
SHOW BARCODE
I was able to run and "IMAGE CRC" via boot loader. it gave me alot of numbers after calculating. not sure if that is a good sign ?
Things I've tried in Recovery.
1. Recovery goes back to black screen.
2. SHOW BARCODE Works- 3 bar codes showed up.
3. Fastboot works. but when i try command "adb devices" it says list of devices attached. but nothing shows up
4. Tried to do a factory reset and tries to do it, then a black phone pops up on screen with green arrow sgoing in circles for like 10 seconds. then reboots to dark screen.
Please Help :crying: Thanks

Can anyone help me with this? I bought the phone with me on vacation and now using an HTC Developer Edition that the button down doesn't work and Volume down button us sunk in But at least i have my phone with all my contacts and apps , For now ?
I would like to know if i can unbrick my other HTC . Thanks.

Late in responding, as I was on work travel myself, and not on XDA for over a week.
ELEVO said:
I think i may have bricked my phone?
Click to expand...
Click to collapse
It's basically impossible for you to do anything with an s-on M8 that will actually brick it. That is the good thing about s-on.
ELEVO said:
I went and installed an RUU firmware file for Marshmallow as most instruct to do via Fastboot. All went well, installation completed and i was able to send command to phone to reboot. when it tried to reboot. white screen with HTC Comes on and then goes almost black with a very light dark grey background.
Click to expand...
Click to collapse
I think you only flashed the firmware.zip and not the RUU. Based on the condition here, and your other thread you created here: https://forum.xda-developers.com/htc-one-m8/help/htc-one-e-m8-fastboot-issues-t3757628
I clearly described above to flash the firmware.zip then the RUU. They are 2 completely different things. Firmware is about 80 MB and only contains hboot, radio, and a few other things. RUU is a full image that is 1.5 GB.
No boot after flashing signed firmware is normal, as it expects the RUU to be run afterwards.

ELEVO said:
Fastboot works. but when i try command "adb devices" it says list of devices attached. but nothing shows up
Click to expand...
Click to collapse
adb doesn't work in fastboot mode. Only fastboot commands will work in fastboot mode. You can only use adb when booted to OS (not an option for you, obviously) or alternately in custom recovery TWRP. So what you describe (adb not working) is normal and expected.
However, fastboot is enough to get the phone working from the described condition.

Related

[Q] Reverting to Stock for Sense 6

I'm aware of the OTA update next week that'll update me to Sense 6.
Currently displays in recovery:
Tampered
Unlocked
S-OFF
Currently on stock 4.4.2 rooted, no other kernel changes, etc. but the ROM I'm using has custom black boot screens added (literally just black instead of default white boot background).
Rooting is nice and all but getting tired and would just like to revert to pretty much locked bootloader, unrooted, factory condition, etc. and be able to also do OTA for future updates.
Any help is appreciated. Baby steps please.
Anyone?
First, relock your bootloader. To do that, start your phone in bootloader mode, connect your phone to pc via usb cable and type "fastboot oem lock" on command prompt. Next, download the proper ruu exe file from htc1guru.com. By proper,I mean the one that matches your phones actual model number and custom id. Execute the ruu while connecting your phone to pc in fastboot mode. Follow the on screen instructions and when finished, you will have s phone that says re locked and s-off. You will get ota in this condition and will be able to install ota and upgrade to Sense 6.0 without any problems.
http://forum.xda-developers.com/showthread.php?t=2695749
Can I just flash that RUU in the link above? It should take me back to stock 4.4.2 with no modifications, stock recovery, and since I have an unlocked bootloader + S-OFF I should be able to get OTA's.
I'm just getting replies and finding info in other threads with different methods so I just don't want to screw up anything.
SaHiLzZ said:
If you are only rooted with stock ATT software, unroot using the SuperSU app, make sure you have stock recovery, and you are golden. DO NOT turn S-ON, and also no need to lock bootloader, as with S-OFF, you will get updates with unlocked bootloader
Click to expand...
Click to collapse
I'm running stock AT&T 4.4.2 but the person who uploaded the ROM used a custom black boot screen (black HTC background instead of white when the phone boots) and so I was worried that might affect things. Hence I thought I could just flash an RUU to go back to 100% stock AT&T 4.4.2 (+ unroot) and maintaining unlocked bootloader + S-OFF so I can OTA.
EDIT: Could I just convert it to a Developer Edition using the link in your signature? Will there be any problems with my AT&T SIM card? All I have to do is relock bootloader and flash the Dev. Edition ROM.
Yes you can flash the decrypted ruu. It is the same as using the ruu exe.
If you haven't changed your mid and/cid,then what you need to is just lock the bootloader and flash the ruu (zip or exe). You will be on stock with s-off which is fine for getting ota.
Yes you can convert to developer edition. The DE and the at&t version are the same hardware-wise (except DE have 64gb storage instead of 32gb on at&t version) and have the same radio bands. You will get faster Android upgrades with no at&t bloats.
mch277 said:
http://forum.xda-developers.com/showthread.php?t=2695749
Can I just flash that RUU in the link above? It should take me back to stock 4.4.2 with no modifications, stock recovery, and since I have an unlocked bootloader + S-OFF I should be able to get OTA's.
I'm just getting replies and finding info in other threads with different methods so I just don't want to screw up anything.
I'm running stock AT&T 4.4.2 but the person who uploaded the ROM used a custom black boot screen (black HTC background instead of white when the phone boots) and so I was worried that might affect things. Hence I thought I could just flash an RUU to go back to 100% stock AT&T 4.4.2 (+ unroot) and maintaining unlocked bootloader + S-OFF so I can OTA.
EDIT: Could I just convert it to a Developer Edition using the link in your signature? Will there be any problems with my AT&T SIM card? All I have to do is relock bootloader and flash the Dev. Edition ROM.
Click to expand...
Click to collapse
You may want to just try and apply the OTA when released. I'm not aware that S-OFF is a problem, I know an unlocked bootloader nor rooted isn't an issue. I got the Rogers OTA with an unlocked bootloader a rooted (by the way was still rooted after the OTA)
Just my 0.02
mb_guy said:
You may want to just try and apply the OTA when released. I'm not aware that S-OFF is a problem, I know an unlocked bootloader nor rooted isn't an issue. I got the Rogers OTA with an unlocked bootloader a rooted (by the way was still rooted after the OTA)
Just my 0.02
Click to expand...
Click to collapse
My understanding is that, if there's any modification in system files, applying OTA may result in a bootloop/brick. I agree that rooted devices remain rooted after OTA. As the OP said that s/he us using a rom with modified boot animation, I suggested him/her to return to stock first.

[Q] help wih stock backup pre-root

I've had a lot of trouble upgrading to KitKat. After attempting to flash different image files for stock recovery/boot/system, I found it impossible to completely unroot the phone using the instructions posted because the phone kept re-rooting itself. Finally, I S-offed, wrote superCID, used the Telus RUU, applied the OTA downloaded to the phone, changed the CID back to GLOBA001 (my carrier is WindMobile). And finally! I know I relocked and unlocked the bootloader somewhere in the process, but I can't quite remember when.
Now, before I even think of re-rooting the phone or installing a custom recovery, I'd like to create a backup of the stock boot, recovery, and system. I tried running
Code:
fastboot boot openrecovery-twrp-2.7.1.1-zaracl.img
using the special KitKat TWRP. There's a message about boot.img being downloaded successfully but the phone reboots to a black screen.
I know that TWRP 2.7.1.0 downloaded from their website worked fine on my phone before I ran the RUU . So I'm not sure that the new TWRP is incompatible with my phone.
If I wanted to use adb instead, I'd need to root the phone before being able to pull the stock recovery, boot, and system images using adb shell. If I have to resort to rooting, is there any way to do so without flashing a custom recovery first? If there is, I might be able to unroot the phone afterward and make it stick. (Delete the supersu apk and su binary, right?)
I remember that the first time my phone attempted to download and apply the OTA automatically, my phone wiped itself. It was a lot of hard work to get it back to a usable state, but it was my own fault for not having a proper backup. I'd like to avoid making that mistake again, and have a stock backup handy on my computer in case there are carrier updates for my phone in the future.
To re-iterate, possible to back up stock everything without root? If not, possible to root without installing custom recovery?
You can no longer boot into a custom recovery, you have to actually flash it.
As far as having the stock recovery and boot, those are actually inside the OTA so you can pull it from there.
Since you'll have the stock recovery already, you can flash TWRP and use that to backup boot and system.
When you need to go stock, just use TWRP to restore your backup and then manually flash the stock recovery.
Since you made the device S-OFF, I recommend that if you need to lock/unlock the bootloader that you use the commands in this thread versus using the htcdev method as that wipes the /data/preload/ folder (as part of its normal /data wipe) which includes a few stock apps.
I had already re-locked the bootloader using the HTCdev method after the upgrade and before starting the thread. Do you think the potential loss of apps would cause any future OTAs to fail? If so, I don't mind re-doing the RUU (no important data on the phone right now). If not, I'll proceed with flashing TWRP.
Thanks for the tip on the alternate unlock method. I'll use that method the next time I need to re-unlock the bootloader.
EveKnight75 said:
I had already re-locked the bootloader using the HTCdev method after the upgrade and before starting the thread. Do you think the potential loss of apps would cause any future OTAs to fail? If so, I don't mind re-doing the RUU (no important data on the phone right now). If not, I'll proceed with flashing TWRP.
Thanks for the tip on the alternate unlock method. I'll use that method the next time I need to re-unlock the bootloader.
Click to expand...
Click to collapse
Locking the bootloader won't do anything, it's only unlocking using the htcdev token that causes the data wipe. So if you haven't unlocked using the htcdev method since running the RUU you will still have the 2 - 3 apps.
I don't know if the /data/preload/ folder is a requirement for a successful OTA update or not but I checked inside my OTA zip for my phone and it does include the 3 items stored there for the VM variant.
The unlock was AFTER the RUU. I ran the RUU, then used the OTA to upgrade to KitKat, then unlocked the bootloader again. However, I didn't notice any apps disappearing and the OTA zip for Wind also has a /data/preload folder.
*Shrugs* Seems good enough to me. TWRP, here I come!
needing wind stock stuck with wind awsy amd wont connect
I have an unlocked desire 601 it finds only wind away I'm trying to get a backup of the stock Rom to flash it does anyone k ow if there any around or even a back up I can use to try to get my phone working on wind home
jayjsteez said:
I have an unlocked desire 601 it finds only wind away I'm trying to get a backup of the stock Rom to flash it does anyone k ow if there any around or even a back up I can use to try to get my phone working on wind home
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2804427
needing help for s-off
EveKnight75 said:
I had already re-locked the bootloader using the HTCdev method after the upgrade and before starting the thread. Do you think the potential loss of apps would cause any future OTAs to fail? If so, I don't mind re-doing the RUU (no important data on the phone right now). If not, I'll proceed with flashing TWRP.
Thanks for the tip on the alternate unlock method. I'll use that method the next time I need to re-unlock the bootloader.
Click to expand...
Click to collapse
hey i have unlocked desire 601 but only says wind away and wont connect ive knoticed the wind version is the same as the other versions but im wondering do i need the wind rom in order for it to pick up the wind home i cant seem to find anywhere online the wind rom and everytime i try to s-off it saysfailed and ive followed everything is there any insite you could give me to help me with this issue if its fixable again my phone says wind away but wont connect to it and i need to get it working as its my only device and carrier i use thx
---------- Post added at 11:29 PM ---------- Previous post was at 11:16 PM ----------
EveKnight75 said:
I had already re-locked the bootloader using the HTCdev method after the upgrade and before starting the thread. Do you think the potential loss of apps would cause any future OTAs to fail? If so, I don't mind re-doing the RUU (no important data on the phone right now). If not, I'll proceed with flashing TWRP.
Thanks for the tip on the alternate unlock method. I'll use that method the next time I need to re-unlock the bootloader.
Click to expand...
Click to collapse
hey i have unlocked desire 601 but only says wind away and wont connect ive knoticed the wind version is the same as the other versions but im wondering do i need the wind rom in order for it to pick up the wind home i cant seem to find anywhere online the wind rom and everytime i try to s-off it saysfailed and ive followed everything is there any insite you could give me to help me with this issue if its fixable again my phone says wind away but wont connect to it and i need to get it working as its my only device and carrier i use thx
-Duir- said:
You can no longer boot into a custom recovery, you have to actually flash it.
As far as having the stock recovery and boot, those are actually inside the OTA so you can pull it from there.
Since you'll have the stock recovery already, you can flash TWRP and use that to backup boot and system.
When you need to go stock, just use TWRP to restore your backup and then manually flash the stock recovery.
Since you made the device S-OFF, I recommend that if you need to lock/unlock the bootloader that you use the commands in this thread versus using the htcdev method as that wipes the /data/preload/ folder (as part of its normal /data wipe) which includes a few stock apps.
Click to expand...
Click to collapse
I don't understand how you can pull the stock recovery from the OTA. I thought OTA's are immediately installed, instead of stored untill you want to install it? So, how do you backup the stock recovery?
It is saved until you want to install. When it go finishes Downloading, just choose install later. And you will be able to copy it into other storage devices and extract files and what not. I'm not sure if it stores in internal or external I'm 80% sure external sd if you have one.
Sent from my HTC0P4E1 using XDA Free mobile app

[Q] Looking for Stock Recovery 1.58 to do OTA and Have Quick Questions

FOUND THE RECOVERY (See below)
Right now my goal is to go back to stock to flash the OTA Update. I am running my nandroid back up I first made when which is the 4.4.4 w/ Software # 1.58.502.1. and right now I have TWRP as my recovery.
Also can someone confirm something for me. This nandroid I am running is rooted obviously and has SuperUser on it. If I go back to the stock recovery can I still do the OTA update even though SuperUser is there and the phone is unlocked?
Also in order to get the stock recovery back on the phone I need to use ABD and the windows command prompt method correct?
Thanks
found this link and was able to find the stock recovery finally. I clicked "Non-WWE- Recovery Images" Ten on the site it opens I clicked the more recoveries folder at the top and 1.58.502.1 was the first one.
http://forum.xda-developers.com/showthread.php?t=2701376
Now the only thing I need to know is if going back to stock recovery will allow me to update to OTA even though there is SuperUser on my device and even though I am rooted and unlock (S-on)
magicbumm328 said:
found this link and was able to find the stock recovery finally. I clicked "Non-WWE- Recovery Images" Ten on the site it opens I clicked the more recoveries folder at the top and 1.58.502.1 was the first one.
http://forum.xda-developers.com/showthread.php?t=2701376
Now the only thing I need to know is if going back to stock recovery will allow me to update to OTA even though there is SuperUser on my device and even though I am rooted and unlock (S-on)
Click to expand...
Click to collapse
As long as the ROM is stock (nothing modified by root) and stock recovery, you can update by OTA (root okay, unlocked bootloader okay).
Another option, just relock the bootloader and run the 4.4.4 RUU. It saves you from all the hassle (finding stock ROM and stock recovery), plus installing 2 OTAs. Only reason to do it the way you are, is to keep user data (RUU wipes phone) and it also saves you from having to relock.
redpoint73 said:
As long as the ROM is stock (nothing modified by root) and stock recovery, you can update by OTA (root okay, unlocked bootloader okay).
Another option, just relock the bootloader and run the 4.4.4 RUU. It saves you from all the hassle (finding stock ROM and stock recovery), plus installing 2 OTAs. Only reason to do it the way you are, is to keep user data (RUU wipes phone) and it also saves you from having to relock.
Click to expand...
Click to collapse
Well I do have the stock ROM. Idk if it having super user on it counts as being modified by root though? If not then its fine. And as mentioned I found the stock recovery as well.
The only reason I was looking to do it this way was because I do not really know what RUU is or how to do any of it. Idk how difficult it would be to relock the boot loader then figure out the RUU thing. Idk what the differences are between that and my phone being rooted as it is now are. I'll have to see if there is a thread that explains this RUU thing to me.
Thanks for the help and suggestion too btw
magicbumm328 said:
Well I do have the stock ROM. Idk if it having super user on it counts as being modified by root though? If not then its fine.
Click to expand...
Click to collapse
SuperUser is same as root, and is fine.
When I say "modifed by root" that often is when a user deletes "bloatware" they don't want, or adds apps, or modifies apps in the system partition.
If you didn't explicitly do any of those things, you should be fine. You will know this is the problem when you install the OTA, as the install will fail with the error message that the "system has been modified".
magicbumm328 said:
The only reason I was looking to do it this way was because I do not really know what RUU is or how to do any of it. Idk how difficult it would be to relock the boot loader then figure out the RUU thing. Idk what the differences are between that and my phone being rooted as it is now are. I'll have to see if there is a thread that explains this RUU thing to me.
Click to expand...
Click to collapse
RUU = ROM update utility
RUU is super easy, you don't really need much guidance to use it. LOCKED or RELOCKED bootloader is required to run it (UNLOCKED if okay if you have s-off). PC required, and the RUU will wipe the phone (so backup any personal data you want to keep, into your PC, cloud, etc.). Aside from those points, RUU is a self-explanatory executable (.exe) program that runs from your PC, and simple to use.
Relocking the bootloader is accomplished easily with a single fastboot command (after connecting phone to PC and booting into fastboot mode): fastboot oem lock
This is also assuming you did the bootloader unlock yourself, and therefore have fastboot/adb setup on your computer.
Running the RUU itself (after relocking the bootloader) is very easy. Boot into OS (some folks have better success being booted into fastboot mode, but I think the RUU is designed to run when booted into OS), connect to PC, then just run the RUU executable on your PC. The RUU executable will then just guide you what you need to do. Its mostly automated, you just need to confirm a few dialogue screens, etc. The RUU will reboot the phone a couple times, install the needed files automatically, and that's really it.
However, since you seem confidant you already have a stock ROM and corresponding stock recovery, I suppose the RUU doesn't gain you too much. But if you hadn't done those steps already, it often saves folks the hassle of tracking down the right stock ROM and recovery for their CID and current firmware. RUU in my opinion is a cleaner install, as it installs a complete stock image (not just updating piecemeal, like an OTA often does).
Also, since OTAs typically need to be installed in sequence, you will probably need to OTA to 2.23 software, than another OTA to 3.42 software. As RUU is a complete image, it would get you to 3.42 software in one fell swoop.
One other thing to note, is that if you are for some reason not connected to AT&T's network (using another carrier, another country, etc.) you will not get any OTAs on the AT&T branded device. AT&T oddity here, most other version will still OTA, even when not connected to a specific carrier. In contrast the AT&T RUU is able to be downloaded and run by anyone with an internet connection and PC (regardless of country, carrier, etc.). I'm under the assumption that most folks on this forum section are on AT&T's network, although I know that some are not (you haven't stated either way).
RUU links are included on my Index thread under heading "RUUs": http://forum.xda-developers.com/showthread.php?t=2751432
Aside from wiping the phone (OTA keeps user data, but you may end up wiping anyway if you run into bugs after OTA), the other downside to RUU is that you need to relock the bootloader. Then you need to unlock the bootloader again (via the HTCDev.com site, or alternately sunshine) if you want to install custom recovery, install custom ROMs, root, etc.
So the choice is really yours (RUU versus OTA). I'm just giving it as an alternative.

[Q] Help Unroot and go back to full Stock 5.0.2

I got this phone off a friend, and I have a opportunity to trade my M8 for a M9 plus cash. The problem is that the guy won't trade without the phone being completely stock with no root or any signs.
I've searched quite a bit on this forum for answers and everything is for older versions of Android. I can't find what RUU I would need or if it's even available. I seen a guide and tutorial from theunlckr, but it's from mid 2014.
I'm looking for a complete guide from start to end that will put this phone back to stock. This would be my first time and I don't know jack about what to do when it comes to this stuff. I'm very computer savvy so it shouldn't be a issue.
The info is following when I boot into recovery:
First off, the HTC logo will appear saying it's property of HTC and something about developers in red.
Software Status : Modified
Unlocked
M8_UL_CA PVT SHIP S-ON
HBOOT-3.19.0.0000
[email protected]
OPENDSP-v47.2.2-00564-M8974_FO.1024
OS-4.28.502.1
eMMC-boot 2048MB
4/20/15
There is also a Team Win application or recovery when I choose to do a factory reset.
Please if someone can help, I need to do this soon.
rlockwich said:
I've searched quite a bit on this forum for answers and everything is for older versions of Android. I can't find what RUU I would need or if it's even available.
Click to expand...
Click to collapse
You want the Lollipop (Android 5.0.2) AT&T RUU (software number 4.28) which is linked on my Index thread at the top of the General AT&T M8 forum section: http://forum.xda-developers.com/showthread.php?t=2751432
Relock the bootloader (command: fastboot oem lock) then just run the RUU (Windows executable).
rlockwich said:
I got this phone off a friend, and I have a opportunity to trade my M8 for a M9 plus cash. The problem is that the guy won't trade without the phone being completely stock with no root or any signs.
Click to expand...
Click to collapse
What "completely" stock means is a bit complicated (and may vary depending on the person). You can relock the bootloader and run the RUU. Everything will be stock, except that the phone will say RELOCKED in bootloader instead of UNLOCKED (which is the factory condition).
The only way to make it say LOCKED is to s-off by sunshine ($25) then change the flag to LOCKED. Then go back to s-on. But IMO, its not worthwhile to spend money to sell/trade a phone; and not worth the money, time and effort for something that is very minor.
Functionally, there is no difference between RELOCKED and LOCKED. The only reason anyone would care, is if they want to make a warranty claim with HTC. In that case, they may deny any claim anyway, since there is already a record of the bootloader being unlocked via HTCDev.com (tracked by the phone's IMEI). Not even sure if the warranty (1 year from purchase) would be valid, anyway for a device that has changed hands 2 times.
I would recommend you ask the buy/trade partner if RELOCKED bootloader is okay. Otherwise, find someone else to trade with.
rlockwich said:
First off, the HTC logo will appear saying it's property of HTC and something about developers in red.
Click to expand...
Click to collapse
This, and TWRP recovery will be gone once you RUU.
RUU will re-image the entire phone to stock factory (Lollipop) condition. So it will be stock ROM, stock recovery, no root, etc.
You should also remove your SD card (if one is inserted), then go into phone settings and wipe all storage, to make sure the internal storage/virtual SD is wiped of your personal data.
Will this make him be able to do OTA updates for when 5.1 comes?
rlockwich said:
Will this make him be able to do OTA updates for when 5.1 comes?
Click to expand...
Click to collapse
Yes. The only requirements for OTA are stock ROM and stock recovery, which post-RUU state satisfies both.
Note that OTA updates for the AT&T version are only available when connected to AT&T's network. So if the buyer is asking if he will get OTAs, and he happens to be using another carrier, the answer is NO. And in that case, the RUU for the next update is his best option.
It was a success! Thank you for taking the time to help me out. I really appreciate everything you've done!
Do you think it's necessary to wipe from the settings in backup/restore after doing the RUU?
I read somewhere that there are files left behind from the root, after unrooting....does the RUU wipe all of this away, so there won't be a need to do a 2nd reset after the RUU completes?
rlockwich said:
Do you think it's necessary to wipe from the settings in backup/restore after doing the RUU?
I read somewhere that there are files left behind from the root, after unrooting....does the RUU wipe all of this away, so there won't be a need to do a 2nd reset after the RUU completes?
Click to expand...
Click to collapse
Can never remember for certain; but I think RUU just wipes user data, and normally leaves internal storage intact. Not just files used for root, but personal files, too. So you will want to make sure internal storage is wiped.
Therefore, I do recommend going to Backup & Reset in Settings, pick Reset phone in order to make sure internal storage is wiped.

"Unfortunately, AT&T Ready2Go has stopped." Is stuck looping on my phone.

"Unfortunately, AT&T Ready2Go has stopped." Is stuck looping on my phone.
About a year ago I rooted my phone, following these directions. (I can't yet post a link, but the first option on google when searching "how to root m8" is the site, htconeroot.com, that I used.)
This morning I noticed that my phone was not vibrating anymore no matter if I restarted the phone or what settings were applied. So I checked online to see if there was a fix, and a factory reset was recommended.
So when I got back from work today, I thought I had successfully uninstalled the root using SuperSU. Then I performed a factory reset. My phone then went into TWRP recovery which was alarming. So I rebooted the system from TWRP , then the message in the title kept popping up over and over again, so I am in a bit of a pickle. I can message and call at the moment but that is about it.
I'm thinking the problem is similar to this one someone had on a note 3, except I was trying to factory reset rather than update. http://forum.xda-developers.com/showthread.php?t=2663120
Has this happened to anyone else, and do you have any suggested fixes for resetting this phone???
Thanks in advance.
I've seen a number of cases on the M8 forums of various processes stopping with message "XXX has stopped" after a factory reset. Not sure what is causing this. But there are a variety of ways to recover.
Since you have TWRP, you can try to restore a TWRP backup of your own (if you made one) or install a stockish ROM. Those methods may be helpful if you want to retain or retrieve any personal data.
Otherwise, relock the bootloader and RUU back to full stock (RUU will wipe the phone).
redpoint73 said:
Otherwise, relock the bootloader and RUU back to full stock (RUU will wipe the phone).
Click to expand...
Click to collapse
Honestly I'd be fine returning to full stock, at least for the time being, to see if the vibration problem would fix itself. But do I need to be S-OFF for RUU?
eaflook said:
But do I need to be S-OFF for RUU?
Click to expand...
Click to collapse
No, and I wish folks would stop saying you need s-off to RUU (not you, but I assume you got this notion from another post/thread).
You can run the an RUU made for the AT&T M8, as long as you aren't "downgrading" to a previous version (such as Lollipop to Kitkat). For that, you need s-off; or to change the CID and run another carrier version RUU.
You do need to relock the bootloader to run RUU while s-on, with command: fastboot oem lock
Are you currently on LP or MM (what does it say for OS number on the bootloader screen)?
redpoint73 said:
No, and I wish folks would stop saying you need s-off to RUU (not you, but I assume you got this notion from another post/thread).
You can run the an RUU made for the AT&T M8, as long as you aren't "downgrading" to a previous version (such as Lollipop to Kitkat). For that, you need s-off; or to change the CID and run another carrier version RUU.
You do need to relock the bootloader to run RUU while s-on, with command: fastboot oem lock
Are you currently on LP or MM (what does it say for OS number on the bootloader screen)?
Click to expand...
Click to collapse
Um... the OS line on the bootloader screen looks blank, unless I'm looking in the wrong place.
Should I do this? http://forum.xda-developers.com/htc-one-m8/help/guide-how-to-solve-soft-brick-phone-t2824193
eaflook said:
Um... the OS line on the bootloader screen looks blank, unless I'm looking in the wrong place.
Click to expand...
Click to collapse
No, you're looking in the right place. Its somewhat common for OS number to be blank, its a known bug in older TWRP versions that it deletes the OS number.
What does it say for hboot number and radio number?
If the phone still on the stock ROM you originally rooted on? If so, is it Lollipop, Kitkat, etc.?
eaflook said:
U
Should I do this? http://forum.xda-developers.com/htc-one-m8/help/guide-how-to-solve-soft-brick-phone-t2824193
Click to expand...
Click to collapse
You can do that. All that "guide" describes is one way to get a ROM on an SD and flash it, which is one of the options I already suggested in Post #2 above.
But what ROM will work, somewhat depends on the info I requested above.
redpoint73 said:
What does it say for hboot number and radio number?
Click to expand...
Click to collapse
hboot number-3.19.0.0000
radio [email protected]
redpoint73 said:
If the phone still on the stock ROM you originally rooted on? If so, is it Lollipop, Kitkat, etc.?
Click to expand...
Click to collapse
Yes it is still on the stock root ROM. I am running Lollipop 5.0.2.
eaflook said:
hboot number-3.19.0.0000
radio [email protected]
Yes it is still on the stock root ROM. I am running Lollipop 5.0.2.
Click to expand...
Click to collapse
You should be fine flashing most any ROM on the AT&T or "international" M8 development forums. Just avoid other dev sections for variants, such as the Sprint or Verizon dev sections.
Before flashing a ROM, you may want to update your TWRP version to 3.0.whatever.
Although I have to admit, I'm still on TWRP 2.8.4, and its worked fine flashing LP and MM custom ROMs. Any older than 2.8.something may cause issues.
Alternately, relock bootloader and run RUU 4.28.502.2 (Lollipop). If you want to run the Marshmallow RUU (6.20.502.5), you'll need to flash the MM firmware first, then RUU. Link that describes that process, as well as all ATT RUUs is on my Index thread: http://forum.xda-developers.com/showthread.php?t=2751432
redpoint73 said:
You should be fine flashing most any ROM on the AT&T or "international" M8 development forums. Just avoid other dev sections for variants, such as the Sprint or Verizon dev sections.
Before flashing a ROM, you may want to update your TWRP version to 3.0.whatever.
Although I have to admit, I'm still on TWRP 2.8.4, and its worked fine flashing LP and MM custom ROMs. Any older than 2.8.something may cause issues.
Alternately, relock bootloader and run RUU 4.28.502.2 (Lollipop). If you want to run the Marshmallow RUU (6.20.502.5), you'll need to flash the MM firmware first, then RUU. Link that describes that process, as well as all ATT RUUs is on my Index thread: http://forum.xda-developers.com/showthread.php?t=2751432
Click to expand...
Click to collapse
Do you know how I might update TWRP from 2.7.0.2?-----Nevermind, I got it.
eaflook said:
Do you know how I might update TWRP from 2.7.0.2?-----Nevermind, I got it.
Click to expand...
Click to collapse
Good practice is to post what you did (or going to do) for the benefit of others that may have the same question; or so we can verify you are on the right track.
In case others may have the same question (or you get stuck again), all TWRP versions, and instructions (recommend install with fastboot method) are here: https://twrp.me/devices/htconem8gsm.html

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