Mobile Network Support and BandOppo A15 have Dual Nano-SIM Card Slots,Oppo A15 support all GSM Based network providers. Oppo A15 mobile device support 2G Band Frequency at GSM: 850/900/1800/1900 and Hight Speed 3G Network Band at HSDPA 900,HSDPA 1900,HSPDA 800,HSDPA 1800,Oppo A15 also support LTE based 4G Networks Support at Frequency level 4G LTE B1/B3/B5/B8/B38/B40/B41,comes with network handling support with Network settings and work offline with flight Mode.