Hi, i recently received a cheap (around 12$) GSM module, namely the SIM800. It is the same one used by Adafruit Fona. I can communicate with it through the serial port, sending AT commands etc. However, it doesn't seem to want to connect to the cellular network, even if it should (since Adafruit uses it and the bands seemed compatible, right?). Specifically, i am following the instructions here and everything seems normal such as the module name and revision or the SIM card number. However, when I send the crucial AT+COPS? command, i get back +COPS: 0 instead of something like +COPS: 0,0,"Carrier_name".
Any ideas on what could be going wrong? I just hate to think that i bought yet another GSM module just for it not to be compatible in Europe (i live in Sweden and my carrier is Comviq).
The GSM module I have is this:
Thanks in advance! :)