Verykool S351 Beryl 3G was officially announced in June 2014, Device released in June 2014Mobile Network Support and BandVerykool S351 Beryl 3G have Dual Card Slots,Verykool S351 Beryl 3G support all GSM Based network providers. Verykool S351 Beryl 3G mobile device support 2G Band Frequency at GSM 850,GSM 900,GSM 1800,GSM 1900 and Hight Speed 3G Network Band at HSDPA 850,HSDPA 1900,comes with network handling support with Network settings and work offline with flight