Lenovo Vibe Z was officially announced in November 2013, Device released in November 2013Mobile Network Support and BandLenovo Vibe Z have Micro-SIM Card Slots,Lenovo Vibe Z support dual mode based on GSM/CDMA based network providers. Lenovo Vibe Z mobile device support GSM 2G Band Frequency at GSM 900,GSM 1800, Lenovo Vibe Z mobile device support CDMA 2G Band Frequency atand Hight Speed 3G Network Band at HSDPA 2100,3G for CDMA supports at CDMA 2000,Lenovo