Help unbrick and update Mega 6.3 sgh-i527 - Samsung Galaxy Mega

My phone was previously rooted (can't remember if I used mobogenie or Kingoroot). I un-rooted using superuser in an attempt to get the update to 4.4. when I tried to boot in recovery mode it says "System software not authorized by AT&T has been found on your phone. Please turn off your phone and go to the nearest ATT store for help" and "Secure Fail: KERNEL". It can be put in download mode. I've tried using odin to go back to the stock rom but get a "fail" everytime (with the pit file and without) and the message "Complete(Write) operation failed". I also tried to push files using fastboot but the computer doesn't recognize my device when I type "adb devices" -- nothing comes up. I also tried Kies but it just keeps saying "connecting" but never does.
Ultimately what I am trying to achieve is #1 unbrick the phone (of course) and #2 to end up with at least 4.4 (or possibly higher if available).

Try flashing just the boot loader in odin. That saved me several times

Related

[Q] Doesn't enter in recovery mode, doesn't start

Hello there,
Well, my Galaxy S 2, after uninstalling a program, got an error (black screen, need to restart...) and so doesn't start anymore (freezes at "Samsung Galaxy S II" screen) or enter in recovery mode (freezes with the robot on background, without letters). I have the download mode yet.
I tried to flash a rom with odin, but it freezes at "NAND write start" process (I've waited 30 min), and I have to abort disconecting the phone.
Could anyone help me?
Thanks
You get into the download mode. That's good. The flashing fails. That's not good.
We need more info to help you. The fact that you had some error and now cannot flash some firmware does not really help us. At least me...
Here are some questions I have:
What firmware did you try to flash?
What Operating System are you using?
Do you have KIES installed?
or
Where do you got the drivers from?
Did ODIN work in the past or did you never use it before?
Sent from my GT-I9100 using XDA App
Thank you for answering.
I've never flashed any firmware before on this phone (it has the original one). I tried to flash the stock XXKI1, using just the PDA field. So, Odin still at "NAND write start" part.
As I said, I had an error after uninstalling an app (launcher error), that I've forced to remove the battery. After that, the phone didn't start anymore (freeze at "Samsung Galaxy SII" screen), and I can't enter in recovery mode.
I don't have Kies installed (got the drivers separated).
Sorry that it took me so long to answer you.
If you still have the problem, I'll try my best to guide you through the process of restoring your device.
What do you want to install on your device?
-A stock rom
-A customrom based on TouchWiz
-CyanogenMod
-MIUI
Just let me know and I'll help you asap.
A stock rom...
Okay, where do you live? Or more accurate, what language do you want to use later?
Your first step is to get the "Heimdall Suite" up and running on your PC.
Download it from their homepage. Extract it somewhere where you can easily find it later. Then you'll need to install the drivers.
Put your phone into download-mode and plug it in. If they aren't installed yet, Windows will now start the installation. When completed, open the "drivers"-folder in the Heimdall folder. Run "zDiag" as administrator.
Enable the show all devices option and select either "Samsung USB composite device" or "Gadget serial" (depending on what's available in your dropdown-list). Install the driver and ignore the warning from Windows (install it anyway).
Now that everything is set up, your first step is to get the ".pit" file for your device. I'll check whether yours is valid. Open the Heimdall frontend as administrator and go into the last tab. Click on detect device and, if your device gets detected, click on print pit. If you get errors in the output, disconnect your phone, shut it down and enter download-mode again. Retry.
Please post the output here.
Sent from my GT-I9100 using XDA App

[Q] BOOTLOOP No Normal or Recovery Boot/ Downloader works/ Odin does not detect on PC

Phone specs:
Samsung Galaxy S3 Verizon SCH-i535
It was already running KitKat 4.4.2 before I rooted
This is my first time rooting and flashing ROMs to my Samsung Galaxy s3 and I have bricked it. I'm pretty sure it can be salvaged but have yet to find anything that works.
I have written the long version for those who need it, but the short version is that I screwed up and can no longer boot into recovery mode or normal mode, I'm not even sure if Download mode is working, and my device isn't recognized by Kies or Odin on my PC so I cannot yet do a recovery from there.
As of now my phone only boots into Odin Mode and gives the following info:
ODIN MODE
PRODUCT NAME: SCH-I535
CURRENT BINARY: SAMSUNG OFFICIAL
SYSTEM STATUS: OFFICIAL
QUALCOM SECUREBOOT: ENABLE
BOOTLOADER AP SWREV: 2
and displays the yellow triangle error and says: Firmware upgrade encountered an issue. Please use Software repair Assistant & try again.
I tried to use Samsung Kies which has an emergency firmware tool but my device will not connect and become recognized by the program.
This is pretty much where I'm stuck.
Keep reading if you need additional info.
Steps leading up to problem:
I was able to Root the device succesfully
I then downloaded the latest CM11 package (cm-11-20140217-NIGHTLY-d2vzw.zip) and Gapps
I also downloaded the TWRP recovery img (openrecovery-twrp-2.7.1.0-d2vzw.img)
Once I had these downloaded I got the app [ROOT] Rashr - Flash Tool
I opened the app and tried to do a backup but I'm pretty sure it failed, or at least it said it failed. I couldn't find out how to check, but was not worried since I have already backed up my important files to the verizon cloud.
On the app I went to recover using other file and found the TWRP recovery img I downloaded.
From here I booted into recovery manually, but it did not bring up the TEAMWIN screen for TWRP like I've seen in other video tutorials so I rebooted into normal mode went to the Rashr app again and followed the prompt to do a Recovery boot using the TWRP img.
THIS IS WHERE THE PROBLEMS BEGAN:
It began to lead into recovery mode but it gave a message that said something along the lines that I have tried installing a custom OS and to take my phone to the nearest verizon store.
I turned it off and tried to boot back normally but got the same error.
I tried to boot into Download mode and was successful! So I thought yaay!
Read a tutorial to reload a stock version of android here: http://forum.xda-developers.com/showthread.php?t=2586319
I followed all the steps but when i got to 7. which said You should see your phone under ID:COM (you should also see it has been added in message) I was not seeing my phone there. I figured it may be OK since I was able to install the drivers so that meant the USB was working so I went ahead and ran Odin to recover Jelly Bean 4.3 onto the device.
My thoughts and guesses as to what the problem is:
I think that it may be because I was already running 4.4.2 and/ or didn't have the proper bootloader when I tried to do the TWRP recovery.
Am I on the right track? Thanks for any help!
Please ask. In correct forum this is int'l s3 (i9300) forum

Stuck in download mode

Hi i had tried to go back to stock ROM on my galaxy s4 but i ended up getting a failed error in the middle of it flashing the firmware getting a device removed error then my phone went off and rebooted in Odin mode saying that software update failed i tried using Odin and Verizon wireless repair assistant but my phone is not being recognized in either program i usually get my phone to be recognized by going into recovery first and going to the bootloader but i can't get into recovery mode now is there a way i can get my phone to be recognized on my computer without going into recovery mode

Help installing custom or regular OS with Odin (Rev check failed)

I have a Samsung Galaxy S7 and can get into download mode. That's about it. The phone is NOT rooted and debugging is NOT on.
Cannot get into regular startup (error says something about smart switch, after an unsuccessful wipe)
Cannot get into recovery mode. It gives me an error.
Luckily I still have the box which says the mode number: G930W8VLU2APK3 , and I bought it from a Bell store so I was able to find the correct firmware, however I get a Rev check error when flashing it via Odin. I even tried a few variants and am getting the same error.
Any suggestions? I have tried flashing without Bootloader but still get the same error

Stuck in locked bootloader download mode

Hey all, hope everyone is having a great day (I'm not),
I own a SM-T510 Samsung Galaxy Tab A 10.1 WiFi.
It all started when I tried to flash Nexus and it worked partially, but I didn't gain access to my internal storage for some reason, so I reverted back to stock rom.
Then for some reason part of the nexus rom was still there, but I was afraid of damaging my device further.
For some reason, netflix wasn't working, so I tried to apply a software update to my device using Smart Switch.
The update didn't work and I was caught in a Nexus bootloop. I entered download mode and I tried flashing twrp using odin. I thought it worked until I realised that it wouldn't get past the teamwin screen.
I re-entered download mode and there it gave me an option to factory reset the device while locking the bootloader. This is where I screwed up as I thought what else could possibly happen to my device?
SO I locked my bootloader and whatever I did I couldn't get out of download mode. AND here I screwed up even more. I tried to flash the stock ROM again using odin as a last resort but it just wouldn't complete after 10 minutes, so I closed Odin and restarted my device and here I am, stuck in a screen that says, "An error has occurred while updating the device software. Use the Emergency recovery function in the Smart Switch PC software." Now obviously this wouldn't work because my device isn't even listed there. But to note, my device is recognised by Odin and my PC.
Note: I am an absolute noobie at rooting so be easy on me.
Note 2: adb and fastboot doesn't work for me for some reason, my powershell says, "The term 'fastboot' is not recognized as the name of a cmdlet, function, script file, or operable program.
Check the spelling of the name, or if a path was included, verify that the path is correct and try again."
Thank you all for any help. I am at my wit's end.

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