Mobile Network Support and BandXiaomi Poco X3 have Hybrid Dual Sim Card Slots,Xiaomi Poco X3 support all GSM Based network providers. Xiaomi Poco X3 mobile device support 2G Band Frequency at GSM: 850/900/1800/1900 and Hight Speed 3G Network Band at WCDMA B1/B5/B8,Xiaomi Poco X3 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.