Nokia Lumia 2520 was officially announced in October 2013 , Device released in December 2013 Nokia Lumia 2520 made under Lumia.Mobile Network Support and BandNokia Lumia 2520 have Micro-SIM Card Slots, Nokia Lumia 2520 support all GSM Based network providers. Nokia Lumia 2520 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,HSDPA 1800,