I turned the phone off, took the battery and SIM Card out, put it in 5 minutes later hoping it would work again, it did not.
I did a reset of the phone (accessories, clear storage, 1234), that did not work.
This morning I tried swapping SIM cards with someone else (to see if was the service provider). Both SIM Cards worked in my friends Sony Ericsson but neither worked in my HTC Excalibur.
I have the 3V0 Windows Mobile 6.5 installed.
Is there a way I can fix this?