Is it possible for a network to get an N900's IMEI if the device doesn't have a SIM installed? I know some sources (such as Michal Jerz's superb preview) suggest the GSM radio is off when no SIM is there, but most GSM phones have to able to make an emergency call even if there's no SIM. I wondered if those who understand how Fremantle handles telephony could shed some light on this.