HTC One M7 Unlocked GSM 4G LTE Quad-Core Smartphone w/Beats Audio - Black 3G: HSDPA 850 / 900 / 1900 / 2100, 4G: LTE 700 / 850 / 1700 / 1900 / 2100 4.7-inch Super LCD3 Capacitive Multi-Touchscreen w/ Protective Corning Gorilla Glass 2 Android v4.3 JellyBean (upgradable), Quad-Core 1.7 GHz Krait 300 Processor Chipset: Qualcomm APQ864T Snapdragon 6, Adreno 320 Graphics Internal Memory: 32GB, 2GB RAM 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.