LG G Flex D950 Titan Siver 32GB 6" Curved OLED Display 4G LTE Unlocked Smartphone GSM 850 / 900 / 1800 / 1900 WCDMA - 850 / 1900 / 2100 LTE 700 / 850 / 1900 / 2600 Unlocked - Can be used with any GSM Network in the world 6" Curved OLED Display 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.