I used this phone for a couple of months and I didn’t notice any problem I used this phone for gaming also and I played most of game without any lag like asphalt 8, Nova 3 etc but while playing these games I noticed some heat and touch response is very fluent even I am using tempered glass on it still touch is very smooth call quality is awesome I didn’t get any kind of pitchy sound while hearing and front facing camera is good for video calls camera is just average not that great not that bad.