I am using this since 2months, speed is very slow, touch sensitivity is very bad. Its OS has a lots of bugs, gps is not accurate. Speed of phone is very bad, shame on lenovo for manufacturing such a slow phone, amd saying it an Octacore processor. Its a very well constructed smartphone but it have many bugs, its caused by the bad optmization of his software.Processor is not working as they said octa core.not satisfy with lenovo. Some time touchpad not working. And heating So much. The performance is weak. In spite of octa core processor, it lags to much and also shutter down.