Originally Posted by fwuffypaws
was flight mode on? flight mode disables the SIM card to cancel all communications
Thanks. I can't be sure, as the power button didn't produce the menu with the flight mode option. Anyway, it was a long time ago and I solved the problem by reinstalling the system. I guess that the culprit was links2sd (I was previously unaware that I had flashed a system that already had a2sd) as I did'nt re-install it and the phone has been behaving much better.