What service provider is the Razr on?
If it's Verizon, US Cellular, Sprint, or Alltel (as well as a few other providers) there is no SIM card. AT&T and T-Mobile (as well as a few other...
open phone...press center menu button...scroll right to "tools"....scroll down to 5.System...press center ring....scroll down 2.Device info....press center ring...highlight my number. press center...
It is the phone itself.
SIM cards are peculiar to GSM phones. There are other types that do not use a SIM card. The SIM card carries information that is specific to the subscriber.
All phones...