Micro / Mini SIM Card for any Unlocked GSM Phone (No Annual Contract) Compatible with T-Mobile's Nationwide 4G Network, as well as any other GSM carrier that uses SIM cards (like AT&T).|Service Activation Card included|Simply pop it into your unlocked GSM phone (phone that uses a SIM card) and you're all set!|Compatible with any phone that uses either a micro SIM (i.e. standard) or a Mini SIM.|Not compatible with phones that use a Nano SIM (like iPhone 5/5s, or 6/6 Plus ) 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.