I agree. A lot of bugs, freezes ...: Does not send the photo in app Viber, unloads from memory the app VKontakte, the battery is discharged very quickly ...and so on .
firmware e7_blackview_20160829_141838

Hi, smartphone hang when I send photos in appl. Viber!
When I return to the main screen of the appl. VK is unloaded from memory and the notifications stop coming, how to make it running in the background mode?