Originally Posted by NJBlackBerry
Generally when you restart a BlackBerry the carrier branding "splash screen" comes up. Try popping out the battery and see what it tells you.
Options / Network will show you what network you are currently registered to; 99% of the time that is the carrier, but it is not 100% foolproof. Last week in Las Vegas, the network (accurately) showed Cingular but my BB provider was T-Mobile. I was roaming because T-Mobile does not have a network there.
No logo on restart after battery removed! No identifyable markings on the SIM card or inside where the battery is. Just a plain SIM card with ID numbers on it.
And my corporate plan is a U.S. based BB... I'm currently in Canada so it shows me Rogers in the network. But it's a U.S. number from a U.S. provider. So I can't tell! ack! Help me! hehe