Unlocked M8 Android 5.1 lollipop GSM GPS Digital Camera Dual Sim AT&T T-Mobile Ultra-Slim Stylish 3G Smartphone built with a solid frame and elegant edges Factory Unlocked - QuadBand: GSM 850/900/1800/1900MHz WCDMA 850/2100MHz | Compatible with Most GSM Carriers in the World - AT&T / T-Mobile / Straightalk / Simple Mobile / Airvoice etc. | Dual Sim Cards Slots (Standard + Micro) Dual Standby 6.0-inches QHD Capacitive Touch Screen - Great For Movies | WiFi & Bluetooth Supported | G-Sensor Auto horizontal function | Support External Memory micro SD card up to 128GB (Card sold separately) Latest Android 5.1 Lollipop - Smart, simple, and truly yours | Supports Google Play Store - access to millions of free and paid-for applications available to download straight to your smartphone (Facebook, Twitter, WhatsApp, Skype, Instagram, YouTube, Netflix etc.) Additional Features: Smart wake, Proximity Sensing, Gesture Sensing, Bluetooth, GPS Navigation, MP4, MP3, FM Radio, Sound Recorder, Video Player, 3G, Gravity Sensing, Maps, Gmail etc.