Vivo Y71 was officially announced in April 2018, Device released in April 2018Mobile Network Support and BandVivo Y71 have Dual, (Nano Sim) Card Slots,Vivo Y71 support all GSM Based network providers. Vivo Y71 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 Y71 also support LTE based 4G Networks Support at Frequency level LTE 2100,LTE 1800,LTE 850,LTE 2300,LTE 2500,