Phablet 6 Inch Android 4.2 GSM Tablet Phone - Unlocked - At&t Dual Core 2g Phone Tablet Pc w/ Mtk6572 7inch 512mb+4gb Dual SIM Bluetooth Wifi Fm GPS 6 inch phone tablet 3g support wifi dual camera Unlocked cell phones are compatible with GSM carriers like AT&T and T-Mobile as well as with GSM SIM cards (e.g. H20, Straight Talk, and select prepaid carriers). Unlocked cell phones will not work with CDMA Carriers like Sprint, Verizon, Boost or Virgin.