HTC One S Android Smartphone (Unlocked), 16GB with Beats Audio - Gray 3G HSPDA 850/900/2100 MHz 4.3 inches Super AMOLED capacitive touchscreen Dual-core 1.5 GHz CPU, 16 GB ROM, 1 GB RAM Dual Camera with LED Flash, Primary 8 MP with autofocus Non-removable Li-Po 1650 mAh battery, 10.5 hours talk time 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.