Huawei Nova 4 was officially announced in December 2018, Device released in December 2018Mobile Network Support and BandHuawei Nova 4 have Dual, (Nano Sim) (Dual 4G VOLTE) Card Slots,Huawei Nova 4 support all GSM Based network providers. Huawei Nova 4 mobile device support 2G Band Frequency at GSM 850,GSM 900,GSM 1800,GSM 1900 and Hight Speed 3G Network Band at HSDPA 850,HSDPA 900,HSDPA 1900,HSDPA 2100,Huawei Nova 4 also support LTE based 4G Networks Support at Frequency