Samsung Galaxy S3 SGH-i747 4G LTE GSM Unlocked 16GB No Warranty (White) S Voice-It responds to you: you can tell the phone to wake up, answer an incoming call, or even take a photo. Smart stay-It waits till you're asleep: the screen maintains a bright display as long as you're looking at it. S Beam-It shares what's in your heart: place two Samsung GALAXY S III's back-to-back and you can transfer pictures, music, videos, and more. Display-4.8 HD Super AMOLED of high-definition display; true and perfect color with ultrafast response time. Advanced Security-It will keep your valuable business asset secure safely and connect to your corporate network securely with leading mobile security solutions and the smart mobile work environment. 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.