S23 ultra stuck with UI 6.1

[Luhta]

Hi All,

I recently bought S23U from Ebay. It is still on One UI 6.1. Last update was an android security patch on 1st February 2025. 

Things I did

1. I checked the CSC code is CPW and it looks to be UK (where I reside). 

2. Tried samsung switch with laptop but no luck.

3. I have not done a factory reset yet.

Any thoughts on fixing this? Thanks in advance. 

[keith30]

Vodafone

[Luhta]

No the seller said it is unlocked. And I have a sim which uses Vodafone as a carrier on 2nd slot.

[Tourbillon De La Vie]

Nobody knows where the phone originated. Manual update using Odin remains. How it's done is beyond these forums

[Luhta]

Sure. Thank you.

[SharpSwitch]

Same I'm stuck on one ui 6.0 on s21 ultra

[Luhta]

Sorry to hear that. Is your CSC code and country of residence same?

[Piper123]

I'm a bit confused here as the SM906B is for S22+ from your first image, not the S23 Ultra.

SM918B is for S23 Ultra

Has the old owner done something with the software or am I missing something here?

[Tourbillon De La Vie]

Well spotted. Might be a fake

[Luhta]

Yes, strange. Just noticed it.
It says S918B for model number and in rest all places.