Plum Boot Unlocked Dual SIM Flip Phone (Blue) - GSM Quadband, Camera, FM Radio, Social Networks GSM 850 / 900 / 1800 / 1900 - Dual Sims Quad Band & Dual SIM, 1.3 MP Camera, Bluetooth Micro SD card slot (Up to 32GB), GPRS / MMS / SMS / WAP, FM Radio 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.