Xiaomi Black Shark Helo was officially announced in October 2018, Device released in October 2018Mobile Network Support and BandXiaomi Black Shark Helo have Dual, (Nano Sim) Card Slots,Xiaomi Black Shark Helo support all GSM Based network providers. Xiaomi Black Shark Helo 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,Xiaomi Black Shark Helo also support LTE based