I wanted to share my experience on vivo v15 Pro.
From last few months it Lags while I am using it and also after upgrade of android11, It gives battery power supply resistance problem, Where phone only get switch on when you put it on charging otherwise it wont get switch on and here if you will speak to service center they will straight tell you to replace the battery if such problem will come why should we go for this brand after paying 29K.
After upgrading it to the android 11 I am not only the one who have faced this battery issue into my phone even one of my friend who bought this phone on my recommendation he had the same issue after upgrading it to android11.
I have done many research on this battery problem and here I come to know vivo has some kind of defect for battery its not only with v15pro even the same issue comes in vivo every mobile phone model.
I will not recommend vivo any handset model for such issues and even I will not buy it again.