ZTE Blade S7 was officially announced in October 2015, Device released in October 2015Mobile Network Support and BandZTE Blade S7 have Dual, (Micro Sim + Nano Sim) Card Slots,ZTE Blade S7 support all GSM Based network providers. ZTE Blade S7 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 900,HSDPA 1900,HSDPA 2100,ZTE Blade S7 also support LTE based 4G Networks Support at Frequency level