New ASUS Zenfone 5 8GB 4G LTE (Unlocked) A500KL 5" One Micro Sim 2GB Ram White ASUS Zenfone 5 4G LTE (Unlocked) One Micro Sim, 2GB Ram/8GB 5-inch, HD 1280x720, IPS panel with multi-touch Qualcomm MSM8926 QuadCore 1.2GHz 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.