Microsoft Lumia 950 Dual was officially announced in October 2015, Device released in November 2015 Microsoft Lumia 950 Dual made under Lumia.Mobile Network Support and BandMicrosoft Lumia 950 Dual have Dual, (Nano Sim) Card Slots,Microsoft Lumia 950 Dual support all GSM Based network providers. Microsoft Lumia 950 Dual 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 1700,HSDPA 1900,HSDPA