Ok so the problem is this ... The phone does not connect to network on gsm mode ... if it's on auto lte/wcdma/gsm it works on wcdma. If i select gsm only it does not connect to network. On manual search it all goes ok finds all networks but when I sellect my carrier it says registering on network for about 3-5 mins and after that can't register to network error. On other phone it registers with edge speed.
What can I try ???