Vivo Y79 was officially announced in October 2017, Device released in November 2017Mobile Network Support and BandVivo Y79 have Dual, (Nano Sim) Card Slots,Vivo Y79 support all GSM Based network providers. Vivo Y79 mobile device support 2G Band Frequency at GSM 850,GSM 900,GSM 1800,GSM 1900 and Hight Speed 3G Network Band at HSDPA 900,HSDPA 1900,HSDPA 2100,Vivo Y79 also support LTE based 4G Networks Support at Frequency level LTE 2100,LTE 1800,LTE 850,LTE 1700,LTE 1900,LTE