Zen Ultrafone 303 3G was officially announced in September 2014, Device released in September 2014Mobile Network Support and BandZen Ultrafone 303 3G have Dual Card Slots,Zen Ultrafone 303 3G support all GSM Based network providers. Zen Ultrafone 303 3G mobile device support 2G Band Frequency at GSM 900,GSM 1800 and Hight Speed 3G Network Band at HSDPA 2100,comes with network handling support with Network settings and work offline with flight Mode. Device