What all mobile phone carriers use sim cards?

I am trying to list a cell phone that I have for sale on ebay. I know for a fact that my phone is unlocked for any service provider...and it uses a sim card. I want to list all of the compatable wireless carriers for the phone, but I am not sure exactly who all does/does not use sim cards. From my understanding:





1. Sprint - no sim card


2. T-mobile - yes sim card


3. Cingular - yes sim card (?)


4. Verizon - yes sim card (?)





but for these other ones... I have no clue:





5. US cellular


6. Virgin Mobile


7. TracFone


8. Telus


9. Nextel


10. Fido


11. Cellular one


12. Bell Mobility


13. AT%26amp;T


14. Alltel





Does anybody know for a fact if any of these service providers use a "sim card" for their service?

What all mobile phone carriers use sim cards?
All GSM and CDMA phones require a SIM card
Reply:it depends on kind of frequency used or kind of celullar system is used for instance the analog system as AMPS no need for sim card while digital system GSM need sim card to install in it the IMSI and related info as country code,operator code,space of memory for 200 names,etc....

buck teeth