Sony Xperia T2 Ultra Dual was officially announced in January 2014, Device released in February 2014 Sony Xperia T2 Ultra Dual made under Xperia.Mobile Network Support and BandSony Xperia T2 Ultra Dual have Dual Card Slots,Sony Xperia T2 Ultra Dual support all GSM Based network providers. Sony Xperia T2 Ultra 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