Becuse of Poor Network battery is draining more.
I feel rdaiation while I am calling in latest oxygen os 9.0.2.
And also having poor Network.
Because of weak signal device using more battery.
There must be edit facility in calculator.
When we are doing sum of too many amounts at that time previous amount we can't change so we have to...
there should be not any bug in flagship phone ONEPLUS 6
very battery draining.