Question Can I flash SM-G9980 with SM-G998B firmware?

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fa1rid

Member
May 31, 2021
14
0
Can I flash SM-G9980 (Taiwan BRI) with SM-G998B firmware (any region/csc) or it must be from same model?

Also my model in the network mode doesn't show:
2G Only
3G Only
etc...

it shows only:
3G/2G (auto connect)
4G/3G/2G (auto connect)
etc...

In other words I would like to force network mode to 2G only which I saw available only in the SM-G998B

Thanks!
 

mishufac

Senior Member
Nov 28, 2008
150
24
Bucharest
Samsung Galaxy S21 Ultra
Can I flash SM-G9980 (Taiwan BRI) with SM-G998B firmware (any region/csc) or it must be from same model?

Also my model in the network mode doesn't show:
2G Only
3G Only
etc...

it shows only:
3G/2G (auto connect)
4G/3G/2G (auto connect)
etc...

In other words I would like to force network mode to 2G only which I saw available only in the SM-G998B

Thanks!
No. One is Snapdragon G9980 and other is Exynos G998B
 
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Reactions: fa1rid
Mine has the ability to select 2G only. I suggest you try changing CSC to TGY.

Screenshot_20210602-015622_Call settings.png
 

fa1rid

Member
May 31, 2021
14
0
Oh that's interesting guys. I will change my CSC to TGY then. I can do that by flashing the TGY firmware using Odin right?
Does using the HOME_CSC changes the CSC or I need to wipe all the data?
And after that OTA will work fine?
Thanks!
 

fa1rid

Member
May 31, 2021
14
0
So can I use Odin to flash a new firmware to change the CSC? I want to change from (Taiwan BRI) to (TGY Hong Kong). Please advise, do I need to wipe all data on phone?
 

fa1rid

Member
May 31, 2021
14
0
I tried to flash the TGY using the HOME_CSC and Odin showed pass and then device rebooted, but nothing changed. It's still showing BRI.
 

SoIomon

Senior Member
Jun 11, 2021
58
13
try flashing the firmware if it fails then go to recovery mode using TWRP. before flashing, back it up using TWRP
 

SoIomon

Senior Member
Jun 11, 2021
58
13
you first need to backup your device using Team Win Recovery Project (TWRP).
TWRP.png


after backing it up, go to install and try flashing the firmware.
 

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    Can I flash SM-G9980 (Taiwan BRI) with SM-G998B firmware (any region/csc) or it must be from same model?

    Also my model in the network mode doesn't show:
    2G Only
    3G Only
    etc...

    it shows only:
    3G/2G (auto connect)
    4G/3G/2G (auto connect)
    etc...

    In other words I would like to force network mode to 2G only which I saw available only in the SM-G998B

    Thanks!
    No. One is Snapdragon G9980 and other is Exynos G998B
    1
    You can use my app Samsung Band Selection to force those options. Click on "more network settings", "advanced", and then "preferred network type"