AT+CREG? responses

2 thoughts on “AT+CREG? responses

    1. 1 – registered, home network

      5 – registered, roaming


      This can happen in country border regions, where home network and roaming partners networks have similar signal strength, or even roaming might have better signal. In these areas, and not only for M2M modules but also for mobile phones is very advisable to use fixed network registration, not automatic, to avoid roaming fees. Voice as voice, but data traffic does matter!