title: Discovering Carrier from SIM card with AT commands
body: <p>I'm using a Fibocom G600/G610 GSM/GPRS modem module and would like to interrogate the SIM card to discover which carrier it supports so that I can connect using the correct APN.</p>
  
  <p>Does anyone know whether this is possible and if so, how to do it?</p>
  
  <p>Thanks all.</p>
  
  <p>Ron</p>