GSM Unlocked Devices: AT&T, T-Mobile, Simple Mobile, Cricket Wireless, H20 Wireless
GSM + CDMA Unlocked Devices: All Carriers including: AT&T, T-Mobile, Sprint and Verizon, Etc.
AT&T Locked Devices: AT&T Only
T-Mobile Locked Devices: T-Mobile Only
Sprint Locked Devices: Sprint Only
Verizon Locked Devices: Verizon Only