It seems that in their latest kernel release, Sony has ported kernel 4.4 for all of their devices, including Xperia X which has the same SoC as Redmi Note 3 does, Snapdragon 650. Is anyone trying to port it over? Does anyone think it is feasible to do so? I have been trying to but I don't have much experience so I haven't got it to boot yet. It would be really awesome not to be stuck at an ancient kernel version...