Mi4 has some issue like heating and memory manegment. Yet I have install only 2app but it shows up the memory manegment is 1gb and even after removing that apps, its shows aprox 1.1Gigs. When restart it shows, 2gb available. Therfore there is some problem it also heat up a lot. I have out of station so I could not arrange replacement request.what I I like the most of camera quality is amazing. This phone is doesn’t long last its time period is short. It even heat up after playing small game like archery master3d. Heating issue is the big issue for this phone so I strongly suggest don’t buy thia phone.