My god, i haven`t noticed it before... i read that you flashed to w800 because everybody does that. w810 really isnt a good choice if you have a k750. the thing is that you can flash only to a phone that is basically the same thing just with diferent FW. k750 and w800 are literally the same in every way, they just use different FW. so basically if you flash the files our colleague stated just before me it should be fine. and if not let me know and well look into it properly.