[Q] i747 does not receive or issue voice calls
I've got a At&T i747. Unlocked (through the *#197328640# menus) and rooted it. Loaded it with the GOODNESS ATT v2.4 ROM. It worked OK several days, but today the phone stopped issuing and receiving calls without any visible reason and I did not change anything in the settings. When I dial a number, I hear one beep in the headphone then, the phone writes the call is ended. Same is when I call to it from another phone: the calls ends in seconds without connection. Signal indicator shows one or more bars. I have tried to insert another working SIM, but now there is no signal indicator at all. (I tested both SIMS on another phone of mine: both are 100% OK in and out).
The phone does not say there is no SIM in both cases and does not request unlock code.
I have cleared the cache, the Dalvik: no change.
I have re-flashed the ROM: same.
I have changed the Kernel: same.
I have made factory reset: same.
My feeling it is something connected to unlock or modem, but I don't know what tools can check and confirm it.
Does anyone have idea what can it be? And what should I do?