Hi friends , I using lenovo vibe k5 since 1 year .starting it use to work fine but after 5 to 6 months it gives problems.my mobile has touch screen problem ( big head acs) , software does not update, sometime mobile speaker does not work, battery gets discharge quickly, some times get hang, when head phone is connected volume automatically gets low.OS does not work properly it throws lot of errors and it will heat a lot.hanging with some apps and not able to upload the contact properly even tried many ways.please don’t buy this mobile seeing it’s less price like me.take a good company quality mobile.