Samsung Galaxy Tab 3 7.0 3G T211 8GB-White unlocked phone 7.0 inches (~170 ppi pixel density) Display 8/16 GB storage, 1 GB RAM 3.15 MP, 2048x1536 pixels, autofocus & 1.3 MP Secondry Android OS, v4.1 (Jelly Bean) Dual-core 1.2 GHz Processor 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.