I did the following with too many iphones only 1 displayed this problem:
I have a 1.1.1 unlocked with anySim1.1
It was working fine with my SIM
I installed OkToPrep and upgraded to 1.1.2 then jailbroke it
Set Airplane Mode and Ran anySim1.21u
the phone worked perfectly
after 3 to 4 hours I got no service.
Tried restarting and restarting the commcenter -> did not work
Went back to 1.1.1 and virginized and restored then unlocked
with anySim 1.1 .. still no service
went back to 1.0.2 and virginized then unlocked
and still no service ...
could a HW error occur so suddenly.. I did no drop it or anyth! it just stopped working.
Is there anything else i can try before saying for sure this is a HW malfunction?