from last 2 days I am having same problem .an unknown notification sound is coming ,I checked last three app but it's not from them.
yes..after new update battery has become worse
where is update?..still not received.
OnePlus 7t battery life is very poor. device has problem itself
.they won't accept it
it's normal for OnePlus 7t. their hardware is having issue but they won't accept.
it's their device problem..they can't do anything.. OnePlus 7 series has battery issues
they are busy in launching new devices.
they will suggest...
from last few days ,my device is heating
i dont know why ppl are suggesting dont play games, brightness must be dim, even using 60 ghz n others way to save battery.
if OnePlus device uses...
i am facing same problem..ringing gets low sound