There is a problem in signal receptor of the phone.  I am using phone since March and I have observed that its receptor is bad even my father mobile recieves better signal strength than mine . My father is using Asus Max M2 (6999 only) and I am using...

Sometimes battery charging takes up to 6 hours and battery drain after using 5-6 hours... and some error is also found in camera department like difference between main camera and 64MP mode is not so much