Xiaomi Mi A1 was officially announced in September 2017, Device released in September 2017Mobile Network Support and BandXiaomi Mi A1 have Hybrid Dual Sim Card Slots,Xiaomi Mi A1 support all GSM Based network providers. Xiaomi Mi A1 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 2100,Xiaomi Mi A1 also support LTE based 4G Networks Support at Frequency level LTE 2100,LTE 800,LTE 1800,LTE