Uninstalling preinstalled programs

[Joe88]

on some devices when you root or modify the core system it will trip a digital flag, more or less voiding the warranty and it cannot be removed, samsung in particular added a nasty system
http://androidforums.com/threads/guide-q-a-myths-and-truths-about-knox.807185/

 

[the_randomizer]

cant you unroot it when you need warranty? i did with my note 3, i guess if it wouldnt boot up that would be a problem though.

Yes, most of the time rooting is reversible, but if you want to remove bloatware, rooting is almost always the only way to do it.