My friend sent me a gift, when I opened my parcel.in this parcel lenovo zuk z1mobile .it is costly mobile.I am using this mobile daily.Its voice is very nice and sweet for ears.its sound in the movie time is the best and video call and voice call sound is very nice.I am using this simply after sometime, in this mibile 2g and 3g network working properly good. All features quality is very good.It is stylish mobile design is medium.Its workng properly and all features works good.battery backup is medium.its 3gb ram and internal memory capacity is 64gb.so reliability is better as my think.Its price is eighteen thousands two hundered nintynine.its battery cspacity is 4100mah and it is not removable.