Vivo X5 Max was officially announced in December 2014, Device released in December 2014Mobile Network Support and BandVivo X5 Max have Dual, (Nano Sim + Micro Sim) Card Slots,Vivo X5 Max support all GSM Based network providers. Vivo X5 Max 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 1900,HSDPA 2100,Vivo X5 Max also support LTE based 4G Networks Support at Frequency level LTE 2100,LTE