Mokee MK80.0 Based on Android 8.0

When, i will get Mokee MK80.0 based on Android 8.0 for d2att known as AT&T Samsung Galaxy S3 SGH i747?
I have an issue with the recent installed MK71.2 based on Android 7.1.2.
1 i cannot change my Network Mode from “GSM/WCDMA/LTE” to LTE/WCDMA.
2 i cannot search for available networks.
Kindly resolve the issue as soon as possible for you dear developer.