I had problem with the phone right from day 1. Maybe, it was because I was not used to this new version of android. I could not copy contact from SIM or even use it dial. I could just view. I confirmed this problem on the net and found solution:
An app to copy SIM contacts. It was solved. The proximity sensor was malfunctioning and even the dealer could not fix it. I found several solutions in the net and I have reduced it but it still does not work well. I am looking for a flip cover case and see if the problem gets solved. Calibration and apps did not solve it. I didn’t like the phone call app ( contacts) .