Lenovo Vibe Z was officially announced in November 2013 , Device released in November 2013 Mobile 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 at and Hight Speed 3G Network Band at HSDPA 2100, 3G for