I need to know what cell phone providers do not require SIM cards because I want a Blackberry and my cell phone provider is CricKet. They told me that if I can find a Blackberry phone that does not require a SIM card from any provider, that they can unlock the phone and set me up with service on the Blackberry. I need to know who requires a SIM card and who doesn't. That way I can choose who I want to buy the phone from.

sprint, verizon,

verizon wireless, alltel, sprint and cricket do not use sim cards they are CDMA

at&t, cingular, and tmobile are GSM and they DO use sim cards