Mobile Network Support and BandVivo Y20i have Dual Nano-SIM Card Slots,Vivo Y20i support all GSM Based network providers. Vivo Y20i mobile device support 2G Band Frequency at GSM: Bands 2/3/5/8 and Hight Speed 3G Network Band at WCDMA B1/B5/B8,Vivo Y20i also support LTE based 4G Networks Support at Frequency level LTE FDD: B1/B3/B5/B8,TD-LTE bands 38/39/40/41,comes with network handling support with Network settings and work offline with flight Mode. Device