Kal, it will not use either. This is an unlocked GSM Galaxy SIII. Therefore, it will be required to use a GSM carrier. In the U.S., you will have to choose from either AT&T or T-Mobile. It will require a SIM card that can be purchased from a GSM provider of your choice. You can go directly through AT&T or T-Mobile or use a MVNO that uses either AT&T or T-Mobile.
This phone is incompatible with both Sprint and Verizon.
Straight Talk offers an SIII that will run either on Sprint or Verizon, your choice.
answered 4 months, 2 weeks ago