What do you think that we are fools, we don't know such a little thing of troubleshooting..we all do lots of thing even replacing the battery and by the way your service engineer doesn't able to solve this problem then what do you think it is solved ...

I have also this problem but your service engineer decline to repair it under warranty...they said"it is occur by physical damage".

performance is worst of your selective focus.It took long time to process it.And by the way they are talking for front camera portrait mode.