Brother, there are no issues, everything is okay, it is an authentic phone. Regarding the issue, there is a slight crack on the top of the display, but it is not a major problem. I have been using the mobile for two months with this crack and it is working fine. The crack is as shown in the pictures. The SIM works, you can reset it by putting in your Apple ID, no problem. Buy it if you like it, otherwise don't.