HTC One X Unlocked GSM Android SmartPhone - No Warranty (White) with Beats Audio Android OS v4.0, HTC Sense, Super IPS LCD2, Touchscreen, Gorilla Glass Beats Audio, MP4/MP3, Stereo FM Radio with RDS 8MP camera, autofocus, LED Flash, 1080p HD video recording, geo-tagging, face detection Wi-Fi, A-GPS support, Bluetooth v4.0 with A2DP HSDPA 850 / 1700 / 1900 / 2100 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.