Verizon Voicemail issue on U1 flashed S9+ with Visible carrier - Samsung Galaxy S9+ Questions & Answers

Hi all,
Alright so this is going to be a long post. So I recently flashed my phone to the U1 firmware, I currently have an unrooted Verizon Unlocked Samsung S9+. I wanted to switch phone carriers over to Visible (subsidiary of Verizon), here are the order of events that occurred:
1. Visible's website says that my device in not compatible using their IMEI checker, there is a solution that was found on reddit about flashing the device on the U1 firmware.
2. I flashed the device on the U1 firmware using Odin and the Visible SIM card worked as expected. No issues with the flash
3. Data/Texts etc.. are all working as expected. Except for Voicemail.
When I try to check my Voicemail, it is acting as if it's still on the Verizon Voicemail system. It says "Welcome to the message management system, please enter your mailbox number". No one can leave me a VM either because of this. I tried several different combinations of numbers, including my full 10 digit cell number and last 4, to which it says "XXX is not a valid mailbox number", which would be because my number is no longer active on Verizon, so it's unable to access it. Which makes sense. The Visible Customer Care team tried the following:
1. Provisioning my VM multiple times
2. Take out SIM card, turn phone off for 1 min, insert SIM card again, and toggle airplane mode for 30 seconds
3. Reset network settings
After numerous days of troubleshooting with them, eventually they said it was because my device isn't compatible, ok, I can't argue with that. I have not seen anyone else experiencing this issue that had flashed their phone to U1 firmware.
After trying all of this with them, I eventually factory reset my device, hoping that might do something. That still did not work.
My questions is, is there something I missed with flashing the U1 firmware? Why is it still using Verizon's VM system even though I flashed it to U1? Is there any way to fix this? Any help is greatly appreciated, and please don't hesitate if you need any other information.

bornxawkward said:
Hi all,
Alright so this is going to be a long post. So I recently flashed my phone to the U1 firmware, I currently have an unrooted Verizon Unlocked Samsung S9+. I wanted to switch phone carriers over to Visible (subsidiary of Verizon), here are the order of events that occurred:
1. Visible's website says that my device in not compatible using their IMEI checker, there is a solution that was found on reddit about flashing the device on the U1 firmware.
2. I flashed the device on the U1 firmware using Odin and the Visible SIM card worked as expected. No issues with the flash
3. Data/Texts etc.. are all working as expected. Except for Voicemail.
When I try to check my Voicemail, it is acting as if it's still on the Verizon Voicemail system. It says "Welcome to the message management system, please enter your mailbox number". No one can leave me a VM either because of this. I tried several different combinations of numbers, including my full 10 digit cell number and last 4, to which it says "XXX is not a valid mailbox number", which would be because my number is no longer active on Verizon, so it's unable to access it. Which makes sense. The Visible Customer Care team tried the following:
1. Provisioning my VM multiple times
2. Take out SIM card, turn phone off for 1 min, insert SIM card again, and toggle airplane mode for 30 seconds
3. Reset network settings
After numerous days of troubleshooting with them, eventually they said it was because my device isn't compatible, ok, I can't argue with that. I have not seen anyone else experiencing this issue that had flashed their phone to U1 firmware.
After trying all of this with them, I eventually factory reset my device, hoping that might do something. That still did not work.
My questions is, is there something I missed with flashing the U1 firmware? Why is it still using Verizon's VM system even though I flashed it to U1? Is there any way to fix this? Any help is greatly appreciated, and please don't hesitate if you need any other information.
Click to expand...
Click to collapse
Please check your voice mail settings in your phone app. See my screenshots.
There you should select the correct service provider and the Visible mailbox number.

Related

[Q] not registered on network. Galaxy 2

Hi.
I have a big problem with my G2, and have tried many things.
It all started 2 weeks ago. I lost connection to my network.
I tried many things, and ended up giving it to a repair shop, in China, as I was there shortly. They put a new firmware into the phone, and a chinese SIM card worked.
I found an english version of the firmware, and asked them to update with that version, No problem. Everything worked well...but when I arrived back to Denmark, same problem. Not registered on the network.
Now I have tried many things, as Kies could not recognize the firmware version. I burned a 2.35 version into the phone with Odin, and Kies regocnized the version, and now updated to 4.03. Great, but ... I have the same problem. APN settings acc to my network provider. Oister 3 in Denmark.
I really have no idea what to do anymore. And I cant send it in for repair, as the flash counter says 10 times.
Is ther someone here, with a very deep knowledge in Logs etc, as I can send Logs if I am explained what to do.
The short time the phone worked, did I really love it.
And also the chinese SIM can not connect from Denmark.
I would prefer all Logs etc in private email, but if we solve it, I will poste solutions and results here.
Best of regrads
Morten
As for the counter, install and run triangleaway - it can be found in the SGSII section of XDA.
Check that the sim card works (try it on another phone) and borrow another sim card (on the same network). It is amazing how many problems like this are due to a damaged sim card or just not connecting correctly. I had a friend who took the sim card out to flash their Samsung Galaxy 3 and put in the sim card wrongly and couldn't make a call.
Can you copy your contacts to or create one in the sim card?
I doubt that it is a problem with the EFS folder, ie no IMEI number because it was fixed with a china sim, but it may be. Is the IMEI number you get from dialing *#06# 004999010640000 or different from the label under the battery? If so then you have a EFS folder problem. There is an app that may fix it - it requires root - * HERE *
Mobile network
Hi
Thanks for the reply.
A:
I can make, copy, edit etc contact directly at the simcard in the phone, and also copy, edit etc from Kies to the Sim card. And yes. It is the simcard I can do those things at. Double checked that it was somcard and not the phone memory
B:
Double checked the IMEI number again.
Label phone same as *#06#
Further information:
In the first day, I tried many many things to get the phone working.
I searched the internet a lot, and I found some kind of help. Like with IMEI check, I should type a code like *#xxxx# or *xxxx* Stupid as I was, I did not write down the code, and also did not safe the page on the internet, so I have no idea what code I wrote. I am sure it was something regarding Mobile network or CSC.
Reg Triangle away.
My phone is no longer rooted, as I try to have it in original mode, so its ready to send to repair, if needed. Triangleaway needs the phone to be routed, right ?
And will that not require an unsafe kernel ?
After resetting, then I suppose I need to install an original kernel again, and will that not make the counter go to 1 ?
Any other ideas ?
Regards
Morten
can you be little clear....
no network or no data (internet) on your current network
1: do you have a locked phone or unlocked. [carrier locked when new]
2: no network will be no signals at all, no phone call....
3: no data will be you cant browse, send receve emails
4: counter can be fixed easy as now your on ics
Hi,
I got the same problem but different scenario
atifsh said:
can you be little clear....
no network or no data (internet) on your current network
1: do you have a locked phone or unlocked. [carrier locked when new]
2: no network will be no signals at all, no phone call....
3: no data will be you cant browse, send receve emails
4: counter can be fixed easy as now your on ics
Click to expand...
Click to collapse
1. my phone is unlocked(international).
2. signal show full, but no phone call
3. I don't use data, but wifi, and no problem with wifi.
Well, this : not registered on network only happen if phone idle for more than 3hrs, meaning phone just work normally if I don't let it idle for long time. This very frustrating as every morning after wake up I have to switch between airplane mode for phone working again.
Greatly appreciated for your help
Thanks in advance
P/s: currently on Slim rom(cm9). But have tried almost all custom rom found in xda, problem still exist. Even try to change CSC to my current country( Thailand) on stock DL7( included Thailand region), no luck. APN setting also change to default network provider.
Mobile network problem
Hi.
Please see my answers below
1: do you have a locked phone or unlocked. [carrier locked when new]
The phone worked before, and was not locked, but as I send a command to the phone, could I have locked it ? How can I check that ? And it does not give me any warning when I start the phone up.
When I try to make a call, it right away says: Dialling ...Call ended.
2: no network will be no signals at all, no phone call....
No mobile network. It is ONLY a problem with phone calls and reciving calls.
I have plenty of signal
3: no data will be you cant browse, send receve emails
Data is right now not working, WiFi works.
I cant get correct APN settings, as my provider sends this as system configuration to the phone, but cant recive it.
3A: My provided is named 3 Oister, and normally this provider is listed under Network operators. On this phone it is NOT listed. 3 Oister is using network of 3, and only network of 3 is listed.
If I pull down the menu from the topbar on the phone, it actually says 3 Oister, but 3 Oister is not listed under Network Operators.
On my other SG2, 3 Oister is listed in Topbar and under Network Operators.
I bought a new SG2 as well, and we are 2 persons using SG2 here.
4: counter can be fixed easy as now your on ics
How ? Can I do that without rooting and install different firmware ?
I do run ICS ver 4.03, updated by Kies.
In worst case, I will send the phone in for repair, but for sure, needs the counter reset.
Regards
Morten
Put a new firmware in the phone then probably wrong modem and CSC for your location .
Chinese sim unlikely to work 4000 miles away but that is easy to swap sim .
Rom counter for ICS use the search tool for the relevant post .
jje
Mobile network problem
Hi
Please find answers below:
Put a new firmware in the phone then probably wrong modem and CSC for your location .
As my counter says 10, you can see, I have tried this several times, and its also written in my first post.
Please send the code for check of CSC and changing CSC. As I remember it is set to be NEE.
Chinese sim unlikely to work 4000 miles away but that is easy to swap sim .
Chinese SIM works all over the world, as long as Roaming is allowed. And it works in the other phone. Now I have the Denmark SIM in, and same problem. Yes, I did close down the phone, changed SIM and started the phone again. Exactly SAME problem.
Rom counter for ICS use the search tool for the relevant post .
Would be nice to have the info written here instead.
regards
Morten
SG2Denmark said:
Hi
Please find answers below:
Put a new firmware in the phone then probably wrong modem and CSC for your location .
As my counter says 10, you can see, I have tried this several times, and its also written in my first post.
Please send the code for check of CSC and changing CSC. As I remember it is set to be NEE.
Chinese sim unlikely to work 4000 miles away but that is easy to swap sim .
Chinese SIM works all over the world, as long as Roaming is allowed. And it works in the other phone. Now I have the Denmark SIM in, and same problem. Yes, I did close down the phone, changed SIM and started the phone again. Exactly SAME problem.
Sim CSC Modem . Firmware .
Then your answer is hardware fault if above are ruled out as not a problem.
Rom counter for ICS use the search tool for the relevant post .
Would be nice to have the info written here instead.
Sorry i refuse point blank to search for someone else .
Neither do i have the relevant post bookmarked otherwise it would have been posted .
jje
Click to expand...
Click to collapse
SG2Denmark said:
Hi.
Please see my answers below
Regards
Morten
Click to expand...
Click to collapse
try this before you send for repair.......
get this stock for your network
http://www.hotfile.com/dl/149692036/21dfd27/I9100XXLPQ_I9100HTDLP3_HTD.zip.html
1: forget all your idea's do exact as i say
2: remove your sdcard
3: using cwm format system, cache, data, sdcard [system is a must]
4: remove battery / insert back goto download mode
5: flash the ROM you downloded using odin, after restart dont do any restores
6: wait for few minutes now dial this *2767*3855# [important]
dont restore any backups including titanium stuff.
if your phone works now put your sdcard back and do whatever now you want.
---------- Post added at 04:29 PM ---------- Previous post was at 04:24 PM ----------
Saisuay said:
Hi,
I got the same problem but different scenario
1. my phone is unlocked(international).
2. signal show full, but no phone call
3. I don't use data, but wifi, and no problem with wifi.
Well, this : not registered on network only happen if phone idle for more than 3hrs, meaning phone just work normally if I don't let it idle for long time. This very frustrating as every morning after wake up I have to switch between airplane mode for phone working again.
Greatly appreciated for your help
Thanks in advance
P/s: currently on Slim rom(cm9). But have tried almost all custom rom found in xda, problem still exist. Even try to change CSC to my current country( Thailand) on stock DL7( included Thailand region), no luck. APN setting also change to default network provider.
Click to expand...
Click to collapse
next time start your own thread........ this time im helping
do as i posted for the OP but instead of his firmware download your country specific firmware.
seems as a modem issue but can be sim related.
Mobile network problem
Hi again
Followed the guide very detailed
3: using cwm format system, cache, data, sdcard [system is a must]
Wiped all data in System and also Wiped Cache, using:
Root the Samsung Galaxy S2 GT-I9100 running XXLPQ firmware and install ClockworkMod Recovery: CF-Root-SGS2_XX_XEO_LPQ-v5.3-CWM5.tar
Done with Super User Granted.
4: remove battery / insert back goto download mode
Done
5: flash the ROM you downloded using odin, after restart dont do any restores
Flashed with Odin 1.85 in PDA: I9100XXLPQ_I9100HTDLP3_I9100NELP2_HOME.tar.md5
6: wait for few minutes now dial this *2767*3855# [important]
Done. Phone shows Factory Reset in big letters
dont restore any backups including titanium stuff.
Nothing restored.
Booted up, and automatic installed APK's
Same problem.
Only difference is that now the counter says 11 counts
But thanks for a detailed and well told possibility.
As I see it, the problem is connected to the standard the phone connects to the Mobile grid. As I told earlier, I made a stupid thing. I send a command with *#xxxx* in the phone, and I cant remember what code, and I did not save the page on the internet. I really think the problem is about a standard. That the phone is setup to a standard that the 3G net is not using in Denmark.
I can dump logs etc, if anyone can help. But I need to know how.
Regards
Morten
buddy your problem was.... network right? is it working now?
forget counter it will be fixed....later using triangle away with ics bootloader
---------- Post added at 12:06 AM ---------- Previous post was at 12:01 AM ----------
if your phone now works fine with calls send and recieve, manually add the apn to get 3G.
Mobile network problem
Hi
Nope. Did not solve the problem.
Just ran Triangle away, and moved the Firmware: I9100XXLPQ_I9100HTDLP3_I9100NELP2_HOME.tar.md5 to the SD card.
Will try now to install it by CWM
And then I give up. Will try to send it for repair ..... really a shame, as I really would have liked to solve it here
Cheers
Morten
Mobile network problem
Hi Buddy
It finds a lot of Networks, but cant connect to any of them
3 networks with 3G and 4 with 2 G
But not the Mobile network I need to connect to> Oister 3
My other SG2 finds that network without any problem
Cheers
Morten
I had the same problem too. At first I tought it was a rom issue, but it wasn't actually. I turned my phone off and removed and placed back my sim card and it worked.
Mobile network problem
Finished programming original firmware using CMW as source for Odin, after counter was reset to 0, and the pnone status is the same as before, but counter is 0.
So will try to send it in for repair.
Thanks to u all.
And SIM card has been removed several times, even tried with a different.
No luck at all
Cheers, and thanks again
Morten
Did you ever get to the bottom of this?
I've been using my phone in Brazil and now i'm in the UK, it's doing exactly as you describe.
...
How would you go about checking these?
Escy said:
How would you go about checking these?
Click to expand...
Click to collapse
Compare the IMEI that displays when you type *#06# to the IMEI printed on the label under your battery. They should be the same.
For your own sake, do NOT post what the IMEI under the battery actually is, whether it's the same as what's displayed when you dial *#06# or not.
As for checking IMEI blocking by the carrier, that should be obvious. Call your carrier.

[Q] GN2 Will Not Connect back to Verizon Network

Hey guys,
I ran the Suckit Verizon boot unlocker exploit, and it was successful. At which point I used TW Recovery to flash Android Revolution HD 8.0 (N7100 ROM). My phone wouldn't connect to the Verizon network, saying I did not insert the proper SIM card. I found this strange, but realized Verizon locks their network to international phones. I then used the Verizon Toolkit to flash back to stock recovery and ROM. After doing so, I still had no luck in activating my phone.
I called tech support (now having stock everything) and they told me it was likely my SIM card. After spending 2 hours at the store today, it is clearly not the SIM card. They have no idea what the problem is...
When I flashed Android Revolution, I wiped my efs. Could that be the problem? Is it possible to flash a new EFS or COM3? I have no clue how to reactivate to the network..
Anyone have this problem? I did a search on both Suckit Verizon and the Verizon toolkit thread and no one appeared to suffer from this. Please help! Any solutions are greatly appreciated. Thanks in advance. Will update if those guys at Verizon come through.
Definitely has to do with wiping my EFS and not saving it. Under Settings > About > Status IMEI is unknown as well as all other carrier info.
Can someone send me their EFS or is their a way to restore the EFS without having backed it up?
Flash the full Odin restore image and that should fix the problem. Note, it will wipe your data and re-lock the bootloader, but it should at least connect to the network again.
If the stock Odin doesn't work since your imei is unknown this may be what you need, but listen to imnuts first
http://forum.xda-developers.com/showthread.php?p=36163537
Sent from my SCH-I605 (AKA NOTE 2)
kintwofan said:
If the stock Odin doesn't work since your imei is unknown this may be what you need, but listen to imnuts first
http://forum.xda-developers.com/showthread.php?p=36163537
Sent from my SCH-I605 (AKA NOTE 2)
Click to expand...
Click to collapse
Flashed stock rom. No luck. Now I have to root back, as one of the prerequisites is being rooted. Will get back.
I kind of had this same problem right after I rooted/unlocked and before flashing any ROMs. I was getting signal bars but kept getting a cannot connect to network error every time I tried to place a call. I called customer service and they "reset" my account, whatever that means but it still didn't work. Started driving to the Verizon store and decided to try one last factory reset and it started working! An IT guy at my work said the account reset plus factory reset got my device sync'd with Verizon signal again. Don't know if what he said is true...don't know why it worked...don't know if this will help you but I thought I would share my experience. I know what you are going through so good luck!
Sent from my SCH-I605 using xda app-developers app
I had almost the same problem using MIUI for AT&T's variant. I was able to get most functionality back by accessing the hidden menu and doing the ##RTN#, but still cannot get 4G LTE back. Maybe this will help you get started too.
http://forum.xda-developers.com/showthread.php?p=36163537
According to the OP instructions - which I have done entirely correct. Put phone in Debugging, Went to Qualcomm settings in Hidden menu and set to "RMNET + DM + MODEM" , connected to the proper COM port, clicked the READ on top, however when I go to click the second read to populate the information -> Says cannot set device into DM mode.
The instructions and accompanied video do not reference having to place the device into DM mode at all. The fact that I am getting this error message is also a unique problem.
Anyone know what this could mean or how to fix it? Could it be due to the USB Qualcomm settings not "taking or shifting", although it does confirm that I changed by saying "Saved"
Also, can Verizon Wireless sync my IMEI in store if I bring the original box with the IMEI barcode on it ? Can they flash / scan it to the phone?
anybody?
Can Verizon Wireless sync my IMEI in store if I bring the original box with the IMEI barcode on it ? Can they flash / scan it to the phone?
I know with a fact that the stores do not carry any flashing software for any smartphones. So there is nothing they can do.
Sent from my SCH-I605 using Tapatalk 2

NOTE 3 N900P SPRINT LOST APN,IMEI after Factory Reset! Help S.O.S

Hi XDA ,
Am new in the Forum & First of all thanks to all of you for helping the forum and people. I'm having difficulties and I cant seem to find the way to fix this(its been 2 weeks)
My problem is the following: I have a Samsung Galaxy Note 3 details:
software version: N900PVPUBMI3
hardware version N900P.00
Status: network: Digital roaming
mobile network type CDMA-AxRTT
Android 4.4.2
KERNEL:[email protected]#1
A friend bought me this phone and called my carrier METROPCS and made them set up the phone so I could use it. they asked him for imei and sim number. He was able to use the phone and 4GLTE(he was doing this to verify it was unlocked) later on he gave me the phone and I had to do the same procedure he did but first I did a factory data reset.
After it I wasn't able to set it up again.
I've noticed that APN SETTINGS has disappeared from the menu, cant search for networks, when I load IMEI it no longer shows the imei but it shows MEID B0000000 and besides all of this I have a message that says SIM CARD INVALID.(but the sim card works perfectly on my other phone)
I will all my life appreciate if you help me with this matter please!
PS. phone is rooted as far as I know(root check on Google play store said it was)
Sir,
Please wait until mods will move this thread to the device specific forum for more relevant answers.
Stand by
Good luck
XDAGeorge305 said:
Hi XDA ,
Am new in the Forum & First of all thanks to all of you for helping the forum and people. I'm having difficulties and I cant seem to find the way to fix this(its been 2 weeks)
My problem is the following: I have a Samsung Galaxy Note 3 details:
software version: N900PVPUBMI3
hardware version N900P.00
Status: network: Digital roaming
mobile network type CDMA-AxRTT
Android 4.4.2
KERNEL:[email protected]#1
A friend bought me this phone and called my carrier METROPCS and made them set up the phone so I could use it. they asked him for imei and sim number. He was able to use the phone and 4GLTE(he was doing this to verify it was unlocked) later on he gave me the phone and I had to do the same procedure he did but first I did a factory data reset.
After it I wasn't able to set it up again.
I've noticed that APN SETTINGS has disappeared from the menu, cant search for networks, when I load IMEI it no longer shows the imei but it shows MEID B0000000 and besides all of this I have a message that says SIM CARD INVALID.(but the sim card works perfectly on my other phone)
I will all my life appreciate if you help me with this matter please!
PS. phone is rooted as far as I know(root check on Google play store said it was)
Click to expand...
Click to collapse
You might try installing this app it find/gives all the hidden info on your device http://forum.xda-developers.com/not.../app-one-click-hotspot-enabler-menus-t2816159 it will give you APN's MEID AND IMEI . All you have to do is download to your PC, it my download as a zip file. Just use 7zip and rename it to an apk, then copy and paste it to your internal sd card via your charging cable. Then click on apk and install. Enjoy !!!
BTW your MEID is on a label under the battery !!!
jimzweb1 said:
You might try installing this app it find/gives all the hidden info on your device http://forum.xda-developers.com/not.../app-one-click-hotspot-enabler-menus-t2816159 it will give you APN's MEID AND IMEI . All you have to do is download to your PC, it my download as a zip file. Just use 7zip and rename it to an apk, then copy and paste it to your internal sd card via your charging cable. Then click on apk and install. Enjoy !!!
BTW your MEID is on a label under the battery !!!
Click to expand...
Click to collapse
Hi Jim/XDA
I'm still not able to connect to the network. Regarding the IMEI on the back part i know its there however what im saying is that im not able to see my imei through command when i dial *#06#
i as well had this errors today when i woke up:
: LTE:ESM-x EMM-14(ive seen this error when this issue started but it dissapeared and it came back know)
data roaming: you have lost data connectivity because you left your home network with data roaming turned off.
On mobile networks i remember i use to be able to select many(GSM,CDMA,etc) now in network mode i only see 2 options LTE/CDMA,CDMA. Currently LTE/CDMA is selected and if you just look at the network mode option without actually opening it it shows CDMA/LTE/EVDO.
Also when i opened the SCRTN it shows on black screen.
I tried to do some minor changes on Galaxy tools like the SIM UICC UNLOCK all mps,sales,default code on XAS. Factory & keystring ON. MSL/SPC show 222222.
After i did SIM UICC UNLOCK and restarted phone know took away all errors but i see the signal bars faded out and with a little red x on top of it. I've read the manual but im still wondering if there might still be things to set on a particular way that are not specified on it Can you please help me set this up properly?
XDAGeorge305 said:
Hi Jim/XDA
I'm still not able to connect to the network. Regarding the IMEI on the back part i know its there however what im saying is that im not able to see my imei through command when i dial *#06#
i as well had this errors today when i woke up:
: LTE:ESM-x EMM-14(ive seen this error when this issue started but it dissapeared and it came back know)
data roaming: you have lost data connectivity because you left your home network with data roaming turned off.
On mobile networks i remember i use to be able to select many(GSM,CDMA,etc) now in network mode i only see 2 options LTE/CDMA,CDMA. Currently LTE/CDMA is selected and if you just look at the network mode option without actually opening it it shows CDMA/LTE/EVDO.
Also when i opened the SCRTN it shows on black screen.
I tried to do some minor changes on Galaxy tools like the SIM UICC UNLOCK all mps,sales,default code on XAS. Factory & keystring ON. MSL/SPC show 222222.
After i did SIM UICC UNLOCK and restarted phone know took away all errors but i see the signal bars faded out and with a little red x on top of it. I've read the manual but im still wondering if there might still be things to set on a particular way that are not specified on it Can you please help me set this up properly?
Click to expand...
Click to collapse
Is this a Sprint variant? If so, you shouldn't have factory reset the phone. It looked like the phone was previously flashed to MetroPCS and by resetting the phone, it removed all the carrier data.
You will have to reflash the phone to get it working again.
nature954 said:
Is this a Sprint variant? If so, you shouldn't have factory reset the phone. It looked like the phone was previously flashed to MetroPCS and by resetting the phone, it removed all the carrier data.
You will have to reflash the phone to get it working again.
Click to expand...
Click to collapse
Is there a tutorial i could follow here ?
I greatly appreciate your help,
Regards
George
Hey guys, for those who need to edit an APN (Access Point Names), there is a little secret.
Go Settings, and scroll down the list. You will find a search box. Type there Access Piont Names and here it is.
The steps above are neccesary, since APN setting is hidden.

Samsung G355H Not registered on network after crashed update

Hello everyone, I'm a desperate noobie here trying to fix this issue for three days now.
So as stated above I have a Samsung Core Duo (SM-G335H) and three days ago I connected trough SmartSwitch and it offered to update my phone. I agreed and during the middle/second half of it my laptop and phone just crashed. I revived both and SmartSwitch told me about the update failure and I made an Emergency Recovery. After that recovery, at first, everything seemed to be working normally, but on the next day I noticed: "Not registered on network " error. It recognizes the SIM card, but when you try to find a network it says "Can't connect. Try later." and so on. I can't call, other peeps can't call me.
I have been researching this matter for days now and am very upset about this. Some say stuff like Odin/flashing/third party tools/settings, I don't know what to do, as I don't have much experience with those things.
Btw, my IMEI is not null, it is being displayed (so I guess the EPF folder is not damaged). The APN settings (I'm on T-mobile) are still there, I don't know what to fix about them.
I am running 4.4.2 KitKat and my Security Patch Level is dated 2016 if that is of any relevance...
I also did a hard reset: nothing. SIM card works in my other phone, so it's not damaged. I just now saw that the end symbols in my Baseband version and my Build number don't match. Could that be it? I've seen people recommending updating manually/flashing with a modem file. How do I go about this?
Also: my phone is rooted. Only that I very clumsily attempted it months ago and before this matter here I would have problems with binary updates and what not, "phone is not rooted completely", I already fixed that issue though, it has SuperSu on it.
Anyway, I may have messed up somewhere along the way leading to this problem.
Please don't recommend me reseting/rebooting the phone again or just re-inserting the SIM card, that doesn't fix it.
I welcome any other suggestions, I hope somebody can help me.

Locked myself out of CSC changing screen [Help]

Obligatory - This is my first post here, please go easy on me. If this is the wrong section please point me where I need to go.
Okay, I have been having issues getting IMS registration (for att) on my N20U (unbranded) Snapdragon. This is an issue because I don't receive most calls without VoLTE, and the service I am using is actually FirstNet. (An at&t service that provides priority cell tower access for first responders.) Who is also dropping legacy 3G and analogue calling at the end of the year.
The FN sim I was given would not change the network CSC to ATT like it should have in order to work properly.
I was able to get to the manual CSC change menu through the dialer code with a TFW-att sim card (yes, while on oneUI 3.0). I suppose the menu is locked out when other csc's are active.
This allowed me to force change to ATT's csc, then place my FN sim in the phone. The kicker? I had to toggle "do not auto update CSC based on sim data" in the menu to get this method to stick.
Things are grand, working fine, but i got curious as to what options the other csc's had to offer. So i start flipping through the list and end up landing on.....you guessed it..... XAA.
Without thinking about it, i ran it, the phone rebooted, and now im screwed. Flashed the ATT rom with Odin- no change. Factory reset? No change. I messed up BIG.
Finale / TLDR
If you didn't get what just happened there, I used a specific sim card to enable a CSC a menu that uncle sammy does not want you playing with. Proceeded to disable auto CSC changing by SIM, then walked back into a CSC that does not allow me to open said menu. Thus preventing my phone from working fully on ANY NETWORK ever again. With root impossible...
Side notes that failed: Tried fac reset/ tried firmware flash/ tried samkey (no android 11 support)/ tried force change from network side. I hope im not out of options?
****you2dude said:
Obligatory - This is my first post here, please go easy on me.
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Please check your PM inbox ASAP. Thank you.
-Regards: Badger50

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