Question Changing CSC from XSA to INU

[Tristan17]

Hi all,
I was just wondering if it's possible to change my S21U firmware to Germany firmware (DBT) since OTA updates come sooner.

 

[varcor]

Hi all,
I was just wondering if it's possible to change my S21U firmware to Germany firmware (DBT) since OTA updates come sooner.

Can't be done.

 

[Tristan17]

Not even with Odin?

 

[varcor]

Not even with Odin?

No, Snapdragon and Exynos FW isn't interchangeable.

 

[Tristan17]

Oh I didn't realise that, is there any other Exynos firmware I can flash that will get one ui 4 sooner though?

 

[varcor]

Give Samsung Smartswitch at try.

 

[imankareem]

I just got OneUI 4 Beta 1 working on my XSA S21 Ultra (Exynos).

1) I had to update to the latest Android 11 firmware - AUHD.

I used Frija to download an Indian AUHD Rom - flashed it using ODIN - used Home CSC to keep my data.

2) Updates from AUHD to OneUI 4 Beta 1 ZUIC using the ADB Update.zip method.

Hope this helps!

 

[Tristan17]

I just got OneUI 4 Beta 1 working on my XSA S21 Ultra (Exynos).

1) I had to update to the latest Android 11 firmware - AUHD.

I used Frija to download an Indian AUHD Rom - flashed it using ODIN - used Home CSC to keep my data.

2) Updates from AUHD to OneUI 4 Beta 1 ZUIC using the ADB Update.zip method.

Hope this helps!

Thank you so much. Does your cell service work well still?

 

[imankareem]

5g and calls over LTE works well. I am using Telstra (Physical sim). I dont use esim. but I assume esims will not be an issue as "Service Provider Software version" still says XSA.

 

[varcor]

I just got OneUI 4 Beta 1 working on my XSA S21 Ultra (Exynos).

1) I had to update to the latest Android 11 firmware - AUHD.

I used Frija to download an Indian AUHD Rom - flashed it using ODIN - used Home CSC to keep my data.

2) Updates from AUHD to OneUI 4 Beta 1 ZUIC using the ADB Update.zip method.

Hope this helps!

The OP has a Snapdragon SoC, your solution can't be applied to a Snapdragon variant.

 

[imankareem]

The OP has a Snapdragon SoC, your solution can't be applied to a Snapdragon variant.

@TridonS21U What model S21 Ultra do you have? Did you buy from an Australian store??

 

[varcor]

@TridonS21U What model S21 Ultra do you have? Did you buy from an Australian store??

OP has already started it's an S21U, that's a US Snapdragon device.

 

[Tristan17]

It's a G998B/DS Exynos bought in Australia

 

[varcor]

So your claim it's an S21U is wrong? Get back when you figure out what's going on.

 

[Tristan17]

S21U means s21 ultra it's an Exynos s21 ultra bruh. G998B is the model number for it

 

[Tristan17]

See:

 

[varcor]

See:

Disconnect, assumed U was the model the designation.

 

[Tristan17]

All good

 

[Tristan17]

I just successfully flashed the Indian September update! Thanks @imankareem

 

[Tristan17]

Will I still get OTA updates since I still have xsa CSC even though Indian firmware is installed?