harshit_soni__ , via OnePlus 9 , Nov 22, 2021 : I recently bought oneplus 9 and i was very happy about it. But day by day things went extremely annoying. Error#1 music playback is lagging when phone is locked. ----#what i tried to solve error 1 --------1 disabled battery optimization for the app. But it is not working. Error#2 phone call app lags everytime. ---- explanation: when i get call the phone lags about 2 second and when i pickup the call than it again lags for another 2 second. Please solve these issues. Else i'll sell this phone and will never look for a OnePlus product (any kind) in future. THIS IS NOT EXPECTED BEHAVIOUR FROM A FLAGSHIP GRADE SMARTPHONE. else OnePlus should call it as errorship. Extremely disappointed.