I am going to tell the true facts regarding my Lenovo A6000. I bought this phone on 3rd Nov 2015. & after almost one month of use I received Android lollipop 5.0.2 update.so I did that update which size was of 1033 MB.and after that update I can’t believe my eyes.seeing that the phone which was working smoothly without any lag before update just started to behave like hang machine just after update.
I just wanted to open call pad.it took 30-40s to open.and also hanged several times while opening apps like WhatsApp, Facebook, messenger etc and most important thing is it hanged mostly during turning on internet. I faced a series of problems after it.so by annoying & disappointing about this I just went to my nearest Lenovo service center and told to degrade my phone to Android Kit Kat 4.4.4.they told that motherboard should be changed to do so.for which they estimated appx. 15-20 days is required. So I gave my phone.and I became very very happy that they just gave me the handset in 10 days.and after that my phone is working like butter smooth. Believe my words.