Unlocked cell phones are compatible with GSM carriers like AT&T and TMobile in the U.S.; phone will not work with Sprint Verizon Boost Mobile or Virgin Wireless service. If you are purchasing this device for use on the TMobile AT&T Tracfone NET10 or Straight Talk networks please contact your carrier prior to purchasing to confirm your carrier will support voice and data on this unlocked GSM device.? Please read and fully understand this unlocked device prior to purchase. Samsung Galaxy S4 I9505 Unlocked Smartphone This premium quality Samsung Galaxy S4 I9505 unlocked smartphone with large color LCD touch screen lets you talk text surf the web and stay connected to emails and your favorite social network sites. Builtin WiFi lets you connect to the internet without using your data plan. You can also capture and share pictures and videos with the 13MP camera listen to music and enjoy your favorite apps. Includes builtin Bluetooth 4.0 NFC technology GPS MP3 playback speakerphone customizable ring tones and voice mail. 5" Super AMOLED capacitive multitouch screen display delivers brilliant colors sharp graphics and smooth movement Powered by Google s Android Jelly Bean operating system16GB internal memory plus microSD memory card slot card not included provides storage for your favorite songs videos and photos13MP camera with geo tagging auto focus LED flash and face and smile detection lets you capture all the fun Model#: Samsung Galaxy S4 I9505 GSM bands: 850/900/1800/1900 HSDPA bands: 850/900/1900/2100 Your carrier will need the info above to confirm if the phone is supported on its network. RETURNS ARE LIMITED FOR MOBILE DEVICES? Once shipped only defective returns or exchange for an identical device can be accepted on unlocked phones. Defective exchanges must be within 30 days of purchase.