I've got a couple of compact flash GSM/GPRS cards and one of them stopped working recently.
I put a terminal program on my WM5 device and sent several commands to the modem to find out what was wrong and discovered that "AT+CREG?" returns "0,3" , where 3=registration denied.
Anybody got any idea what causes registration to be denied?
Any tricks for getting it going?
Thanks for your help.
Nigel H.
