Mobile Network Support and BandRealme C12 have Dual Nano-SIM Card Slots,Realme C12 support all GSM Based network providers. Realme C12 mobile device support 2G Band Frequency at GSM: 850/900/1800/1900 and Hight Speed 3G Network Band at WCDMA B1/B5/B8,Realme C12 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.