XOLO Black 1x was officially announced in October 2015, Device released in November 2015Mobile Network Support and BandXOLO Black 1x have Hybrid Dual Sim, (Nano Sim) Card Slots,XOLO Black 1x support all GSM Based network providers. XOLO Black 1x 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,XOLO Black 1x also support LTE based 4G Networks Support at Frequency level LTE 1800,LTE 900,