I Bought Mi 4i on 16 December 2015.Its been 8 months and I havent found a single bug in this phone.I love that Device.It have 13 MP Primary and 5 MP with Beauty 2.0 with LED Flash and 1080 Px Full HD recording.It have 5.0 inch screen with Corning Anti Scrathing Glass.It have 8 GB RAM and 16 GB Phone Memory.It Runs on On Android OS v 5.0.2 Lolipop with 1Ghz Octacore Processer.It have all qualities of a best phone with affordable price.If you are thinking to buy this device than I say you make a perfect decision.