LG Optimus L5 II Dual E455 5MP, 3G, 4GB, 4", Jelly Bean, WIFI Factory Unlocked World Mobile Phone - White - International Version No Warranty 2G GSM 850/900/1800/1900 3G WDCMA 900/2100 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.