Coolpad Cool1 Dual was officially announced in August 2016, Device released in August 2016Mobile Network Support and BandCoolpad Cool1 Dual have Dual Card Slots,Coolpad Cool1 Dual support all GSM Based network providers. Coolpad Cool1 Dual 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,Coolpad Cool1 Dual also support LTE based 4G Networks Support at Frequency level LTE 2100,LTE 1800,LTE