thanks everyone screen off problem while receiving an incoming call has been solved after removing old screen protector, may be there was a conflict between screen protector & the proximity sensor. Anyways thanks guys.
By the way regarding the development of custom roms, can we install GSI's successfully on mi max hydrogen or helium ? do we have GSI supported vendor & boot ? are the recoveries Batik, Pitch black, Orange Fox & Sky hawk are treble supported ?
Secondly all custom roms available for Mi Max Prime Helium are more or less open sourced AOSP, Lineage etc rather than proprietary Oxygen OS, MIUI 12 etc.
My Mobile is Mi Max 2 Oxygen but my wife mobile is Mi Max Prime Helium, i am trying to install Oxygen OS Erfan GSI & MIUI 12 GSI with no success. Is there any compatible GSI Vendor & boot ?