I have flashed ROM with Ock_GTX_23118_Refreshed and after that phone was working fine.
For some reason then I did hard reset (settings>system>hard reset>clear memory) and restarted phone. After that phone is not NOT IDENTIFYING ANY NETWORK SIGNALS.
In intial set up, it is showing Data connection > AT&T USA
But after starting, it is not showing any Signals or Network operator.
I tried setting manually in Settings > Network Options > manual. Here it is showing either LIMITED NETWORK, NO SIGNAL OR Network registry error.
I tried changing Various operator sim cards but still same problem.
I have flashed with another rom, another hard reset, soft reset, changed sim card..still the problem is there. I also tried adding all US AT&T networks in preferred network list (Setting>Personal>Phone>Network, add/new network), still it is not registering and connecting.
Please guide me what went wrong. How to get signals on my mobile.