Prestigio MultiPhone 5454 Duo was officially announced in November 2014, Device released in November 2014Mobile Network Support and BandPrestigio MultiPhone 5454 Duo have Dual Micro SIM Card Slots,Prestigio MultiPhone 5454 Duo support all GSM Based network providers. Prestigio MultiPhone 5454 Duo 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,Prestigio MultiPhone 5454 Duo also support