Hi, mahdavi.
Welcome to your Nokia community. ;-)
There are other fixes we can try to further isolate the issue. See: Nokia Lumia 930 - Troubleshooter. If the listed fixes did not work and your phone is still covered by your retailer's warranty, we suggest you ask them if a replacement is possible. In case such option is not available, it would be best to visit a Nokia Care Point (NCP) and have it checked by a technician. There are NCP's in Tehran, Iran. Just let us know if you're from there or you are near that area.
By the way, the link we provided will direct you to a support page intended for the Philippines.
All the best! ;-)