Huawei Impulse 4G was officially announced in September 2011, Device released in September 2011Mobile Network Support and BandHuawei Impulse 4G have Mini-SIM Card Slots,Huawei Impulse 4G support all GSM Based network providers. Huawei Impulse 4G 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 1900,HSDPA 2100,comes with network handling support with Network settings and work offline with