The voice on call gets cuts and sometimes shifts to 5g and 4g and 4g to 3g in indoor and outdoor.Please fix problem

I was deleting some of old call recording, i was selecting many listing and some of the listing did not showed blue tick graphics when i tapped see in screen recordingPlease fix and make cleane ui

Maybe this happening due to backgroung process please improve system background processes many unnecessary apps runs in background consuming battery limit all and save batteryIf phone is in standby it should detect and saves battery from background ...

Please check i encontered this i have no ideaAfter beta 2 i noticed i have spotify in deep sleep but in beta 1 this problen never occured after beta 2 its happening .Its unexpectedly goes,dissappers