The Android 15 update on the S21 series does not deserve to be called one UI 7, it's just a custom Android. It changes nothing really, it's a share worst of time.
The carrier locked version of S21 series in the USA have received one Ui 7. Very soon it will extend to the unlocked versions .Please check the info at Sammobile.
It's quite disappointing that one ui 6.1 On S21 series changes nothing but the name just. What's the point in having it while it doesn't possess the same features as other devices having the same software 樂
Your CSC is not Zim, it's USA and the update is available. The reason that you have not received it yet is because you are using a carrier locked version S918U on XAA which is modified to accommodate your sim is Zim.
The update for the S23 Ultra USA carrier locked version is already available. The problem is that for your phone to work with in Africa, it uses CSC XAA which is not carrier locked.You need to change from a carrier locked S918U to the Unlocked versio...