Summer heating issue is normal and as of now the beta version is not fully optimized with the processor, hence heating can also occur due to this and if the heating increases then the battery will drain more and the performance will also decrease.

I did not face any problem with this and the system did not lag but I felt a little jittering. There could also be a heating issue in the beta update because the processor is not fully optimized in beta updates...I hope u understand..

Screen time phele 8hrs -9 hrs Ata h normal uses prr abb sidha 4hr-5hr hogya h

U can't

They just asked me to reset the phone and refused to use any third party devices. At last they told me to go to the service centre.