Hi, I have a Chuwi V88s Quad 16G model CW0842 running Android 4.2.2 but ultimately had some issues like hanging or long delays, did a factory reset  things get better then I need to upgrade to kitkat 4.4 to improve memory management among other things, but baidu sucks and can't find a firmware upgrade anywhere else, ,some advice will be appreciated. Anyway, will it be possible to upgrade the kernel without loosing data? and leaving all other stuff as is keeping jelly bean?

thanks in advance