Originally Posted by hospital349
I agree. Laziness will cause issues. If you're coming from a different kernel and want N.E.A.K. to work perfectly, I advise a Full Wipe. Back up your Internal and External SD's and format them. You can't go wrong if you do this & trust me, it's definitely worth it.
this is fully and completely wrong.
you never need to wipe or format anything if you only change the kernel.
maybe "only" cache and dalvik-cache can be wiped in case different kernels can flash different superuser or any other apps.
I do not know any kernel for sgs2 that installs any scripts or anything else that needs the user data to be wiped.
Current Device: Sony Xperia T