I was waiting for it and the wait is over with disappointment. Some basic thing I faced:
when you need to hang up a call, you must press the hang up button twice or press it after at least 2 seconds later the screen display opens after you finish talking.
Face ditection is slower than very basic mobile phones.
Applications are responding too late comparing to my previous 2.5 year old oppo f1s.
Cameras are terrible. Very very disappointing.
paired Blootooth devices are not recognised unless you tap to them in settings.
Touch accuracy is missings. I could not open matters specially in espn cricinfo app with one tap or with multiple taps sometimes.
Refreshing is a bit time consuming in case of internet surfing.
Poor back finishing with some pores on its back cover.
Other things will be updated whrn I experience.