I am a Lenovo k3 note owner. I bought this phone in January 2015. After installing the update of marshmallow on my phone I am facing some problems with the phone. The phone is not sensing the touch many times, it is showing abnormal battery usage and it is lagging now. If it is 15 percent charged and I put the phone on charging then only in 20 to 25 minutes it shows 60 to 65 percent battery and after only 40 minutes of continuos usage it drains the battery to again 15 percent. I took my phone to the service centre in bhilwara, Rajasthan. They simply reset my phone and handed me over the next day but still the problem is not solved. My phone is still in warranty so please I request you to suggest me and solve my problem as soon as possible Thanking you Lakshay Singhal Bhilwara(Rajasthan)

Regards
Kumarsinghallakshay@gmail.