Question Sim won’t register on network - based in Australia (Fold v SM-F926B) - Samsung Galaxy Z Fold3

Need some help guys. I am based in Australia and swapped an iPhone for the Z Fold 3. Went through the usual connection process with my sim and esim whilst connected to wifi. All was well as it allowed calls and received calls when I was home. As soon as I stepped outside my home where it was trying to use the network, it does not work. It keeps saying not registered on network. Tried to manually select network via settings, checked all APN settings from the network and all is ok. Even tried 3 different carrier sims (Vodafone, Optus and Telstra) yet still no matter what this phone will never connect to any carrier network without wifi. From there I tried 3 different firmwares from Sam mobile just in case it had corrupt firmware. Both android 11 and 12 will not work. Need help guys please. Any suggestions?

Two options
1. Get into recovery and do a factory reset
2. Flash the latest firmware ( F926BXXS1BVB3 ) , firmwares are now Multiregion so no problem with that
Download Galaxy Z Fold3 5G SM-F926B (VAU) F926BXXS1BVB3 in Samfw - Samsung firmware download
Galaxy Z Fold3 5G SM-F926B (VAU - Australia) F926BXXS1BVB3 S(Android 12) samsung firmware download all model, lastest, fast update, completely free and fast speed in Samfw.com ✅
samfw.com
Follow instructions there ...
-----
If that doesn't work , maybe you lost your EFS partition ( it contains your IMEI info ) and that is a big problem
You will have to read a lot here @ xda to try to recover it ( if it'spossible somehow )

Thank you kindly for the information and reply as it is really appreciated.
I can see both imei numbers on the device if this is what you mean? Ironically when the phone is on WiFi with WiFi calling enabled and the simcard plugged in, it allows me to make calls with my number sending to the recipient, it just won't do the same when the WiFi is disabled, I can not communicate out by data nor voice and it keeps saying "not registered on network." I have checked and the phone is not network locked and is clear for use. I will try the firmware link you have sent however if this does not work, may I ask what you think may be next?

To add I have tried various firmware which did not work either.

Can anyone help with this as the above unfortunately did not work.

bruangie said:
Can anyone help with this as the above unfortunately did not work.
Click to expand...
Click to collapse
When you flashed stock firmware , did you use CSC or HOME_CSC ?
You have to use CSC , to get a fresh install
If possible , once flashed get into recovery to perform a Factory reset from there , maybe this can get back the EFS partition that seems to be corrupted
again ... DON'T use HOME_CSC

pvillasuso said:
When you flashed stock firmware , did you use CSC or HOME_CSC ?
You have to use CSC , to get a fresh install
If possible , once flashed get into recovery to perform a Factory reset from there , maybe this can get back the EFS partition that seems to be corrupted
again ... DON'T use HOME_CSC
Click to expand...
Click to collapse
Thank you for your reply. I did use csc and followed all your instructions. Unfortunately still the same. I am so lost as to what to do as I love the phone but can not seem to fix it.

Related

S9 Bootloader, CSC, VoLTE

hi
i used to have VoLTE on my unlocked samsung galaxy S9 (SM-G960FD)
i was on stock rom (G960FXXU1ARB3) when i had both VoLTE & VoWiFi , i had to reset my phone for some reason..... i said why not update and restart ? so i updated to G960FXXU2BRGA and i lost both VoLTE & VoWiFi
i tried downgrading to ARB3 but had no luck since the bootloader was updated.... so its not an option.
can anyone help me to get VoLTE back ? i really need it :crying: and i dont want to lose the warranty
hoomantanha said:
hi
i used to have VoLTE on my unlocked samsung galaxy S9 (SM-G960FD)
i was on stock rom (G960FXXU1ARB3) when i had both VoLTE & VoWiFi , i had to reset my phone for some reason..... i said why not update and restart ? so i updated to G960FXXU2BRGA and i lost both VoLTE & VoWiFi
i tried downgrading to ARB3 but had no luck since the bootloader was updated.... so its not an option.
can anyone help me to get VoLTE back ? i really need it :crying: and i dont want to lose the warranty
Click to expand...
Click to collapse
Hi, you may download an app ''QuickShortcutMaker" on Playstore. After that open the app and search for "lte call". You may find Enhanced LTE Services under Mobile Networks. Select it and select try, now you may turn VOLTE on. Sorry for my broken english.
zeanong said:
Hi, you may download an app ''QuickShortcutMaker" on Playstore. After that open the app and search for "lte call". You may find Enhanced LTE Services under Mobile Networks. Select it and select try, now you may turn VOLTE on. Sorry for my broken english.
Click to expand...
Click to collapse
Thanks for the reply
Found lte advanced services
But its empty ?
hoomantanha said:
Thanks for the reply
Found lte advanced services
But its empty ?
Click to expand...
Click to collapse
So weird, maybe due to different country firmware. I got this.
hoomantanha said:
hi
i used to have VoLTE on my unlocked samsung galaxy S9 (SM-G960FD)
i was on stock rom (G960FXXU1ARB3) when i had both VoLTE & VoWiFi , i had to reset my phone for some reason..... i said why not update and restart ? so i updated to G960FXXU2BRGA and i lost both VoLTE & VoWiFi
i tried downgrading to ARB3 but had no luck since the bootloader was updated.... so its not an option.
can anyone help me to get VoLTE back ? i really need it :crying: and i dont want to lose the warranty
Click to expand...
Click to collapse
May I know your Original Country code(CSC). And, what is your currently active OMC(CSC)? You might use Phoneinfo app for checking the currently active CSC.
Amijaz said:
May I know your Original Country code(CSC). And, what is your currently active OMC(CSC)? You might use Phoneinfo app for checking the currently active CSC.
Click to expand...
Click to collapse
G960FXXU1ARB3
This was originally on the phone when i unboxed it....
But after that, whatever firmware i had installed.... didnt have VoLTE
Now that the bootloader is uodated... i cant even downgrade to that....
I live in Iran... i have tried every firmware on sammobile.com for iran
No luck
zeanong said:
So weird, maybe due to different country firmware. I got this.
Click to expand...
Click to collapse
No, its the same country ( Iran )
hoomantanha said:
G960FXXU1ARB3
This was originally on the phone when i unboxed it....
But after that, whatever firmware i had installed.... didnt have VoLTE
Now that the bootloader is uodated... i cant even downgrade to that....
I live in Iran... i have tried every firmware on sammobile.com for iran
No luck
Click to expand...
Click to collapse
Firmware contains multiple CSC. And, if you flash the firmware via odin sometimes the phone boots with Random CSC. Hence, I strongly feel the device applied a default CSC other than Iran(THR).
Once more please confirm it using Phone Info app, you can find it on Play Store. Or else, check whether the good-old secret code *#272*imeino.1# works or not.
If nothing helps, go for a clean flash of the latest Iranian firmware by putting CSC(not Home-CSC) firmware file in CSC tab on Odin.
Amijaz said:
Firmware contains multiple CSC. And, if you flash the firmware via odin sometimes the phone boots with Random CSC. Hence, I strongly feel the device applied a default CSC other than Iran(THR).
Once more please confirm it using Phone Info app, you can find it on Play Store. Or else, check whether the good-old secret code *#272*imeino.1# works or not.
Click to expand...
Click to collapse
Active CSC code is THR
Amijaz said:
Firmware contains multiple CSC. And, if you flash the firmware via odin sometimes the phone boots with Random CSC. Hence, I strongly feel the device applied a default CSC other than Iran(THR).
Once more please confirm it using Phone Info app, you can find it on Play Store. Or else, check whether the good-old secret code *#272*imeino.1# works or not.
If nothing helps, go for a clean flash of the latest Iranian firmware by putting CSC(not Home-CSC) firmware file in CSC tab on Odin.
Click to expand...
Click to collapse
putting CSC(not Home-CSC)
im gonna try this.....
this might be the issue....
hoomantanha said:
putting CSC(not Home-CSC)
im gonna try this.....
this might be the issue....
Click to expand...
Click to collapse
no....
didnt work :crying:

Can't update to Android 9.0

I just bought samsung s9 SM-G960U but can't it won't update to android 9.0 manually ! it says processing failed
I did some researches I found that it's carrier-related . Some solutions suggests that I use odin to update but I can't choose the right firmware !
In fact :
- when I try to check the csc using *#1234# it show g960usqu2are6 ( I think it's Verizon using google)
- when I log on into samsung website and enter my imei . The product info shows that my carrier type is Sprint
- when I check "about phone/service Provider SW " on my phone the first line contains TMB after G960U and the third line is TGY/TGY/TGY
I'm confused but I want to update my s9 to android 9.0 . Help me
medbouzid said:
I just bought samsung s9 SM-G960U but can't it won't update to android 9.0 manually ! it says processing failed
I did some researches I found that it's carrier-related . Some solutions suggests that I use odin to update but I can't choose the right firmware !
In fact :
- when I try to check the csc using *#1234# it show g960usqu2are6 ( I think it's Verizon using google)
- when I log on into samsung website and enter my imei . The product info shows that my carrier type is Sprint
- when I check "about phone/service Provider SW " on my phone the first line contains TMB after G960U and the third line is TGY/TGY/TGY
I'm confused but I want to update my s9 to android 9.0 . Help me
Click to expand...
Click to collapse
get the firmware here
https://www.sammobile.com/firmwares/galaxy-s9/SM-G960U/VZW/download/G960USQU4CSC7/265795/
get the most recent version of Odin (i didnt source you a link for that)
open Odin on your computer
unzip the package and get your phone into download mode, connecting it to your computer. Allow drivers to install and when Odin recognizes your device by showing a random number in the port field. Then place the files in their corresponding spots in Odin paying attention to which CSC file you use as one factory resets the phone and the other simply applies the update. It is recommended to use the factory reset CSC when changing from different iterations of the Android OS. Press the start button, allow it to full run the firmware push. It will then automagically reboot (yes, automagically), and youre done.
youdoofus said:
get the firmware here
get the most recent version of Odin (i didnt source you a link for that)
open Odin on your computer
unzip the package and get your phone into download mode, connecting it to your computer. Allow drivers to install and when Odin recognizes your device by showing a random number in the port field. Then place the files in their corresponding spots in Odin paying attention to which CSC file you use as one factory resets the phone and the other simply applies the update. It is recommended to use the factory reset CSC when changing from different iterations of the Android OS. Press the start button, allow it to full run the firmware push. It will then automagically reboot (yes, automagically), and youre done.
Click to expand...
Click to collapse
I don't live in US or America , is it okay that I use verizon update ? is there any risk that the the phone would be locked or something like that ?
medbouzid said:
I don't live in US or America , is it okay that I use verizon update ? is there any risk that the the phone would be locked or something like that ?
Click to expand...
Click to collapse
Once a phone is unlocked, it stays that way forever. Firmware has nothing to do with a phone's locked or unlock status.
joeldf said:
Once a phone is unlocked, it stays that way forever. Firmware has nothing to do with a phone's locked or unlock status.
Click to expand...
Click to collapse
Depends how it was unlocked, seen a few members flash new firmware and the phone is SIM locked again, these unlock companies must use some modification to the firmware rather than unlocking it properly
*Detection* said:
Depends how it was unlocked, seen a few members flash new firmware and the phone is SIM locked again, these unlock companies must use some modification to the firmware rather than unlocking it properly
Click to expand...
Click to collapse
Good to know. Wasn't aware that a phone could be unlocked with firmware alone. I guess it's a temporary overlay or something that "fakes" being unlocked?
joeldf said:
Good to know. Wasn't aware that a phone could be unlocked with firmware alone. I guess it's a temporary overlay or something that "fakes" being unlocked?
Click to expand...
Click to collapse
Yea must be something that emulates the unlock somehow but once reset or flashed it's gone, always seems to be people who have bought the phone second hand unlocked, it has worked fine with their sim until they reset or flash different firmware, then it's locked again
No network on device after firmware update
*Detection* said:
[/COLOR]
[/COLOR]
Yea must be something that emulates the unlock somehow but once reset or flashed it's gone, always seems to be people who have bought the phone second hand unlocked, it has worked fine with their sim until they reset or flash different firmware, then it's locked again
Click to expand...
Click to collapse
i am have lost the network on my s9 g960u after an update to android 9 using Odin, tried changing the firmwares to the different ones on the sammobile website, but there is no changes on it, can someone assist on how i can get the network back, it shows FINAL IMER CERT: Fail. someone please help
Odala11 said:
i am have lost the network on my s9 g960u after an update to android 9 using Odin, tried changing the firmwares to the different ones on the sammobile website, but there is no changes on it, can someone assist on how i can get the network back, it shows FINAL IMER CERT: Fail. someone please help
Click to expand...
Click to collapse
what does the phone do when you enter *#06# in the dialer?
No network on device after firmware update
Youdoofus said:
what does the phone do when you enter *#06# in the dialer?
Click to expand...
Click to collapse
i get the imei # 3533*********/**
Odala11 said:
i get the imei # 353xxxxx /xx
Click to expand...
Click to collapse
NEVER provide the IMEI number in public!
spamtrash said:
NEVER provide the IMEI number in public!
Click to expand...
Click to collapse
Thanks:good:
Odala11 said:
i get the imei # 3533*********/**
Click to expand...
Click to collapse
sorry, i should have worded that differently. I didnt need the IMEI, just the fact that the IMEI is what came up and that a valid IMEI shows
Youdoofus said:
sorry, i should have worded that differently. I didnt need the IMEI, just the fact that the IMEI is what came up and that a valid IMEI shows
Click to expand...
Click to collapse
I have a a valid Imei, i have tried different firmwares from:
https://www.sammobile.com/samsung/galaxy-s9/firmware/SM-G960U/VZW/download/
Even after that, when i dial *#0011#, i get the FINAL IMEI Certi: Fail
Hope someone here has a solution for this
Cant Update My S9
I bought this phone about 5 months now and I haven't recieve any update up until this day
My phone baseband version is G960USQU2ARE6
Can someone please help me
Odala11 said:
I have a a valid Imei, i have tried different firmwares from:
https://www.sammobile.com/samsung/galaxy-s9/firmware/SM-G960U/VZW/download/
Even after that, when i dial *#0011#, i get the FINAL IMEI Certi: Fail
Hope someone here has a solution for this
Click to expand...
Click to collapse
i havent tried this method, but i did stumble across this
Boot your Samsung Galaxy S9 or Galaxy S9 Plus
Activate then access the USB debugging mode
Sync your Samsung Galaxy S9 or Galaxy S9 Plus to your desktop PC
Download this: EFS Restorer Express
Access the application and then open the EFS-BACK.BAT file
Choose a method in order to recover the EFS via Odin
https://www.techjunkie.com/how-to-repair-galaxy-s9-imei-number-problem/

CSC Change is still possible?

Hey Guys,
Just wanted to check whether any working methods are around to change the CSC of a Note 10+
Couldn't find any guides apart from the ones which are in Note 9 Sections.
Any support on this is much appreciated!
JazonX said:
Hey Guys,
Just wanted to check whether any working methods are around to change the CSC of a Note 10+
Couldn't find any guides apart from the ones which are in Note 9 Sections.
Any support on this is much appreciated!
Click to expand...
Click to collapse
Im also looking for a solution for this. SamKey's paid service is apparently supporting this but im unsure of the method their software uses and its a paid service. Users in Australia (like me) are having issues with RCS services through Telstra (TEL) because the Open Variant bought direct from Samsung not having the correct CSC. Some users have reported changing the CSC through SamKey successfully.
I have tried flashing with Telstra firmware but no luck.
maeneak said:
Im also looking for a solution for this. SamKey's paid service is apparently supporting this but im unsure of the method their software uses and its a paid service. Users in Australia (like me) are having issues with RCS services through Telstra (TEL) because the Open Variant bought direct from Samsung not having the correct CSC. Some users have reported changing the CSC through SamKey successfully.
I have tried flashing with Telstra firmware but no luck.
Click to expand...
Click to collapse
Paid Service?
Damn... We are also headed towards a Huawei Future now?
JazonX said:
Hey Guys,
Just wanted to check whether any working methods are around to change the CSC of a Note 10+
Couldn't find any guides apart from the ones which are in Note 9 Sections.
Any support on this is much appreciated!
Click to expand...
Click to collapse
Yes I have changed my csc on my note 10+ unlocked by *#272*imei#
Learning0876 said:
Yes I have changed my csc on my note 10+ unlocked by *#272*imei#
Click to expand...
Click to collapse
i do this didn't work which rom you are
maeneak said:
Some users have reported changing the CSC through SamKey successfully.
Click to expand...
Click to collapse
Yes, the only one work for me. 976B
maeneak said:
Im also looking for a solution for this. SamKey's paid service is apparently supporting this but im unsure of the method their software uses and its a paid service. Users in Australia (like me) are having issues with RCS services through Telstra (TEL) because the Open Variant bought direct from Samsung not having the correct CSC. Some users have reported changing the CSC through SamKey successfully.
I have tried flashing with Telstra firmware but no luck.
Click to expand...
Click to collapse
I initially did *#272*IMEI# and was able to switch between CSC. When I switched to XAA, I was stuck and could not able to use the *#272*IMEI# anymore.. So I had XAA/XAA/ATT.. I saw many were stuck.
Found a solution that worked for me is as follows. Try at your own risk.
Downloaded the tool from
https://www.mysterious-dev.com/2020/05/changecsc-all-samsung-free-tool-android.html
and downloaded the ChangeCSC Software tool.. . watched the video couple of times.. The process lets you install custom THEME.. I was getting "Update" "Delete" and "Buy" ..
What did was
install another random theme
then went back to the program and clicked change CSC again
this time when I choose the custom theme pack, I saw the "Try now".. after that I followed the instruction to about phone->legal and clicked on CHANGE Carrier Android 10 and VOILA!!! I got that CSC change page.. I saw XAA was selected and I changed to TMB... after that "Sales& Network Code Change" and clicked ok.. .The phone restarted and saw the T-Mobile logo!!!!
I even tried the *#272*IMEI# and this time it worked and showed me the CSC screen!!!
Hope this helps anyone who is stuck...My phone now says TMB/TMB/ATT!!!
visualpro said:
I initially did *#272*IMEI# and was able to switch between CSC. When I switched to XAA, I was stuck and could not able to use the *#272*IMEI# anymore.. So I had XAA/XAA/ATT.. I saw many were stuck.
Found a solution that worked for me is as follows. Try at your own risk.
Downloaded the tool from
https://www.mysterious-dev.com/2020/05/changecsc-all-samsung-free-tool-android.html
and downloaded the ChangeCSC Software tool.. . watched the video couple of times.. The process lets you install custom THEME.. I was getting "Update" "Delete" and "Buy" ..
What did was
install another random theme
then went back to the program and clicked change CSC again
this time when I choose the custom theme pack, I saw the "Try now".. after that I followed the instruction to about phone->legal and clicked on CHANGE Carrier Android 10 and VOILA!!! I got that CSC change page.. I saw XAA was selected and I changed to TMB... after that "Sales& Network Code Change" and clicked ok.. .The phone restarted and saw the T-Mobile logo!!!!
I even tried the *#272*IMEI# and this time it worked and showed me the CSC screen!!!
Hope this helps anyone who is stuck...My phone now says TMB/TMB/ATT!!!
Click to expand...
Click to collapse
Did this method wipe your data and factory reset your phone?
alireza_simkesh said:
Did this method wipe your data and factory reset your phone?
Click to expand...
Click to collapse
Hello,
Prior to doing the process. I used smartswitch and backed up my phone completely.. I also did factory reset the phone.. *** Since I was going to use a new method/tool, I was not sure so wanted to make sure it does not interfere with any existing account/app on the phone. Once I was able to get to the CSC screen and changed to TMB, I went back again to make sure do a factory wipe and start complete fresh out. Hope this helps. Good luck!
visualpro said:
Hello,
Prior to doing the process. I used smartswitch and backed up my phone completely.. I also did factory reset the phone.. *** Since I was going to use a new method/tool, I was not sure so wanted to make sure it does not interfere with any existing account/app on the phone. Once I was able to get to the CSC screen and changed to TMB, I went back again to make sure do a factory wipe and start complete fresh out. Hope this helps. Good luck!
Click to expand...
Click to collapse
Thanks, but I am wondering if the tool wipes out the data on the phone?
The Mysterious Dev tool that you mentioned, when the tool was changing the CSC, did the tool factory reset your phone and wipe it?
JazonX said:
Hey Guys,
Just wanted to check whether any working methods are around to change the CSC of a Note 10+
Couldn't find any guides apart from the ones which are in Note 9 Sections.
Any support on this is much appreciated!
Click to expand...
Click to collapse
alireza_simkesh said:
Thanks, but I am wondering if the tool wipes out the data on the phone?
The Mysterious Dev tool that you mentioned, when the tool was changing the CSC, did the tool factory reset your phone and wipe it?
Click to expand...
Click to collapse
hmm.. don't recall if it wiped.. I already had T-Mobile sim inside.. so when I saw the CSC selection page and as soon I choose TMB it restarted and came with T-Mobile splash Page, at that point I know it worked, so before even finishing up the boot process, I rebooted in recovery and did the factory reset
alireza_simkesh said:
Thanks, but I am wondering if the tool wipes out the data on the phone?
The Mysterious Dev tool that you mentioned, when the tool was changing the CSC, did the tool factory reset your phone and wipe it?
Click to expand...
Click to collapse
I had to do the CSC changing today and it simply rebooted and displayed the new CSC logo. It was with AT&T and when I change it to TMB. I get the T-Mobile boot logo.. I was able to get back in to the device without loosing any data.. The CSC showed TMB/TMB/TMB.. But I noticed the ringer/notifications sound still remained the AT&T settings. So to answer your initial question, my phone didn't get wiped out when switching the CSC.
Thx
visualpro said:
I had to do the CSC changing today and it simply rebooted and displayed the new CSC logo. It was with AT&T and when I change it to TMB. I get the T-Mobile boot logo.. I was able to get back in to the device without loosing any data.. The CSC showed TMB/TMB/TMB.. But I noticed the ringer/notifications sound still remained the AT&T settings. So to answer your initial question, my phone didn't get wiped out when switching the CSC.
Thx
Click to expand...
Click to collapse
Thanks.
After changing your CSC to TMB, are you getting TMB updates (OTA) or ATT updates?
alireza_simkesh said:
Thanks.
After changing your CSC to TMB, are you getting TMB updates (OTA) or ATT updates?
Click to expand...
Click to collapse
After switching to TMB.. I have also wiped out and installed T-Mobile firmware via ODIN.. Getting all TMB OTA updates.
Learning0876 said:
Yes I have changed my csc on my note 10+ unlocked by *#272*imei#
Click to expand...
Click to collapse
Thank you very much. I was just able to unlock my N976U from tmobile to unlock model. I am also getting LTE finally
JazonX said:
Hey Guys,
Just wanted to check whether any working methods are around to change the CSC of a Note 10+
Couldn't find any guides apart from the ones which are in Note 9 Sections.
Any support on this is much appreciated!
Click to expand...
Click to collapse
I have found *some* Samsung models can still change CSC via firmware flash in Odin by following these pre requisites...
- disable find my phone
- sign out of Google and samsung accounts
- developer mode .... enable oem unlock
- flash a single CSC stock firmware in odin (do not use home-csc)
- phone will be completely wjped but after first boot and running setup, CSC will be change to match new firmware
Have any one tried
dezborders said:
I have found *some* Samsung models can still change CSC via firmware flash in Odin by following these pre requisites...
- disable find my phone
- sign out of Google and samsung accounts
- developer mode .... enable oem unlock
- flash a single CSC stock firmware in odin (do not use home-csc)
- phone will be completely wjped but after first boot and running setup, CSC will be change to match new firmware
Click to expand...
Click to collapse
CSC Change:
https://forum.xda-developers.com/galaxy-s20/how-to/free-csc-change-apk-s20-t4116015
SIMPLY DOWNLOAD GOOGLE PHONE APP , DIALL THIS CODE AND ALL CSC APEAR.
*#*#27262826#*#*
Back up first, Everything on the device will be deleted.
thanks @adeltamimy6
this worked for me changed to btu. but still not being offered one ui beta 3. any ideas do i need certain software on phone too phone is sm- n976b. If so what do i need
Samkey works and costs about $10 (Min 3 tokens and 1 token to change CSC) - done it several time on 3 of my Note10+ to change to Telstra CSC - VOLTE / WIFI Calling etc works afterward, It didnt Wipe either
checkout andtron.com

No network after flashing my s20 ultra

Hello everyone.
I bought a used s20 ultra with android 10
Everything ok network ok calls and everything ok
but can't check for update always tell me registration failed
So i flash with odin but unfortunately network didn't work after flashing
So i flashed another rom network appears but cant make calls or internet
Now my phone works good but no network
Don't know what to do
All what i have now imei 1 imei 2 sn
I don't also remember the original rom come with phone
I flashed the phone without check my old version
Very sad of all this
And dont know what to do
Any help
Ahmedzizo0 said:
Hello everyone.
I bought a used s20 ultra with android 10
Everything ok network ok calls and everything ok
but can't check for update always tell me registration failed
So i flash with odin but unfortunately network didn't work after flashing
So i flashed another rom network appears but cant make calls or internet
Now my phone works good but no network
Don't know what to do
All what i have now imei 1 imei 2 sn
I don't also remember the original rom come with phone
I flashed the phone without check my old version
Very sad of all this
And dont know what to do
Any help
Click to expand...
Click to collapse
May be this can help:
I had the same problem abroad. Check settings with your provider are right.
I couldn't find wifi, because my settings using phone abroad where out.
Idebutterpiep said:
May be this can help:
I had the same problem abroad. Check settings with your provider are right.
I couldn't find wifi, because my settings using phone abroad where out.
Click to expand...
Click to collapse
Thanks bro
But still not
Update 1
Flashing new rom and network appear but cant make calls or anything
Another problem

Question AT&T G990U2 to T-Mobile or unbranded firmware help needed

I would appreciate if anyone can point me to the right direction. I have 21FE G990U2 from AT&T, It is unlocked by AT&T.
All I need is working T-Mobile firmware or Samsung (no carrier branding) to flash. I tried multiple versions of U, U1 and U3 firmwares (all matching my current Binary -4) but no success.
I just would like to get rid of ATT bloat. I know I can uninstall it via ADB but I rather have firmware clean of it.
Any suggestion please?
Thanks
So am I right to assume that you are looking for a G990U2 TMB firmware with Binary 4, to flash on a G990U2 AT&T phone?
If so, then you can download it from the below link by clicking on "Download Samfw server" (G990U2OYN4EWC3, April 2023 update):
Download Galaxy S21 FE 5G SM-G990U2 (TMB) G990U2SQS4EWC3 in Samfw - Samsung firmware download
Galaxy S21 FE 5G SM-G990U2 (TMB - United States) G990U2SQS4EWC3 T(Android 13) samsung firmware download all model, lastest, fast update, completely free and fast speed in Samfw.com ✅
samfw.com
or if I am assuming wrong, can you please correct my understanding? As I do not have any practical hands-on experience with the USA models.
Shuhan44 said:
So am I right to assume that you are looking for a G990U2 TMB firmware with Binary 4, to flash on a G990U2 AT&T phone?
If so, then you can download it from the below link directly (G990U2OYN4EWC3, April 2023 update):
https://02-samsung.cloud/v2/IxJCDiMnLh8SLAo5IRtBAzwDMyMyCB4lFzssIDs2ByAzMUEgOzEUQDMQMCMBOyw/LiUzJjIXCDkuJC8/NDseIy8xIQYzOAIlPDAVHRIvMz81CAIkMwsuOB42FA00Nh4LNS8vFjIXLA0NFzE/PAMeOTMADTkDAC4mNBEaMCExQQEhJQUUHjFCMTs4BkIjCyI/Iws8MQEWCDAeCw0xCREHOTQbIyshAD4OIQAGLC44Hiw0ER4OMiUzLDIlDSs8AD4fJhsGOg8HCkA8AywnCRc+Di8LBxAzBy4RDxYpKTwkHjUeBylCJgceKTIXIUAJER4OMi8+AwMSMBsBAzY5LwNBJi8IMAQ4MTQUAQMgLyMsHjM7JDMHLzEjJDgAISk8PxQ9NTggQiYbLyUhJCEpMjsHJzw2KSceFy4QIzEvKw8WIAYhFh4JMjAeLDQsLCM0Gy45IzgGQiMDPB0jJCI/ARYFMCMiExM=
or if I am assuming wrong, can you please correct my understanding? As I do not have any practical hands-on experience with the USA models.
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Click to collapse
You are correct - I need T-Mobile (or carrier free) so I can utilize full carrier settings.
Thanks for the link, however above link gives an error when opening the page.
Nevertheless I will look for TMB firmware with CSC: G990U2OYN4EWC3 and post an update here
Flashed that and still has AT&T boot logo and all the apps
h078 said:
Flashed that and still has AT&T boot logo and all the apps
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Click to collapse
Well, I am sure that you have flashed by a Factory reset (Flashed CSC, not Home CSC in ODIN). The boot logo can be changed by rooting your device, also bloatware apps can be deleted via ADB command without rooting.. but you already have mentioned that you prefer not to proceed with those processes. So I am out of suggestions, sorry.
Just for my knowledge, after flashing the TMB firmware, now your settings> About phone> software information> service provider software version: 2nd line shows as TMB/ TMB/ AT&T?
(Also corrected the download link in my previous comment anyway).
Yes, you are correct i did flash CSC, not home CSC. Then I reflashed w home CSC but software still says ATT/ATT/ATT.
Moreover on Bootloader screen says "carrier ATT" - I have never seen that before on any Samsung phone that I had. I have no clue how did they lock up device that well. As for removing software via ADB that is not a problem, but ATT locks network selection mode so you cant choose between 5G, LTE, 3G etc..
TMobile in US still supports EDGE and sometimes it comes handy - whereas ATT has only LTE and 5G as they re-farmed EDGE and 3G/HSPA frequencies
h078 said:
Yes, you are correct i did flash CSC, not home CSC. Then I reflashed w home CSC but software still says ATT/ATT/ATT.
Moreover on Bootloader screen says "carrier ATT" - I have never seen that before on any Samsung phone that I had. I have no clue how did they lock up device that well. As for removing software via ADB that is not a problem, but ATT locks network selection mode so you cant choose between 5G, LTE, 3G etc..
TMobile in US still supports EDGE and sometimes it comes handy - whereas ATT has only LTE and 5G as they re-farmed EDGE and 3G/HSPA frequencies
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Click to collapse
I do not get why the CSC can never be changed, even after flashing the complete firmware... must be an ATT thing!
Anyway, to change the csc only, there is another very quick & easy method. It takes only 2/3 minutes; no flash or factory reset is required. You have to download and install a small software "SamFW Tool" on your pc/laptop (may need to disable the antivirus during the download/install process). Once done, connect the phone and enable USB debugging mode. Open the software, under the ADB tab, click Change CSC, from the dropdown list select TMB and click Change. The phone will restart and CSC "Should" change to TMB/TMB/ATT.
Here is the download link for the software:
https://www.mediafire.com/file/upaiwadhmstm6js/SamFwToolSetup_v4.6.zip/file
That did the trick. I have T-Mobile CSC now
Thanks a lot
h078 said:
That did the trick. I have T-Mobile CSC now
Thanks a lot
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Click to collapse
Great!
But still, that's only one part of the final solution I think. Your target was to replace the complete firmware from ATT to TMB, right? Since the CSC is now changed to TMB, I think you can give it another try via ODIN to install the TMB firmware now (only if you want). I am not confident that it will work now, but still, one last try should not be much of a hassle.
I think that these multi CSC contain all US carrier customizations....When I changed it to TMB it shows TMB/TMB/ATT and loads bootlogo as well as TMobile apps... I guess it is similar as Blackberry used to be back in the days...Depending which carrier SIM used it loaded proper settings from the firmware...
I have flash my METROPCS G990U2 to G990U3,other sim card work fine,but t mobile sim card does not work ,can someone help me?I already change CSC to xxa,but still no internet,I do have sginal bar​

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