Nokia Lumia 1520 was officially announced in October 2013, Device released in November 2013 Nokia Lumia 1520 made under Lumia.Mobile Network Support and BandNokia Lumia 1520 have Nano-SIM Card Slots,Nokia Lumia 1520 support all GSM Based network providers. Nokia Lumia 1520 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,Nokia Lumia 1520 also support LTE based