I bought a refurbished S23 Ultra off Back Market and it is still on Android 14 and says my system is up to date when I try to update to Android 15, despite the security settings saying otherwise. The same thing happens with Google Play system update, which hasn't been updated since June 2024. I know the S23 Ultra is compatible with Android 15 so clearly something is wrong.
I checked the service provider software version and the active CSC seems to be CPW, which is Carphone Warehouse I believe. Might this have anything to do with my issue?
It is an international model from the UK. If it is possible to still return the phone, you should so so. The only way to fix this is to go to a authorized Samsung service center and have the phone flashed to get the proper software for the US. This will incur a fee, depending on where you are located it can be expensive.
