Sony Xperia U was officially announced in February 2012, Device released in May 2012 Sony Xperia U made under Xperia.Mobile Network Support and BandSony Xperia U have Micro-SIM Card Slots,Sony Xperia U support all GSM Based network providers. Sony Xperia U 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 2100, ST25i - ST25a,comes with network handling support with Network