ZTE MF61 Unlocked Mobile Hotspot Broadband Device ZTE MF61 Router Battery and battery Door USB Cable AC Wall Charger User Guide 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.