The phone is a major disappointment for me because: 1) The UI is several levels worse than that of a Lenovo K6 I have owned for the past 3 years. A lot of the unique and useful functionality present in the K6 is simply not present in the K5 Pro. Things like: - safe zone, where you can have SIM-dependent apps installed for each SIM card - ability to choose SIM card to call number from, even though the default is set, by long-pressing the contact number - call recording 2) The system is buggy; e.g. when rearranging icons on the home screen, a snapshot of the icon image gets stuck on screen until the phone is rebooted to get rid if it 3) The battery behaviour is crazy. This is the second week I'm using the phone and fifth time I charge it....today it's charging backwards! the percentage is actually decreasing while charging. 4) The fact that no system update has been published by Lenovo since the phone came to market. I'm going to look for another phone to replace this, and I'm done with Lenovo for good unfortunately.