The Samsung Galaxy S Duos 3 Charcoal Grey features 4-inch ,Wi-Fi enabled, alphanumeric keypads, it has Dual SIM functionality (GSM+GSM) powered by 1GHz Dual core processor (Android-KitKat)and 3G & 2G Network Support , Primary Camera 5MP, Video player, Music player, Video recording, FM radio with recording, 512MB RAM, 4GB internal memory, Expandable storage capacity 32GB. Additional feature which you will get it are Handset, Guide, phone book memory, call memory & SMS memory, important apps like ChatOn, Yahoo Messenger, Facebook, Twitter, Google talk; call blacklists and much more features with one year manufacture warranty for the phone and 6 moths for the in-Box series.