Rooting only for making an app a System app

[henrytigro]

Hello everyone,
I never rooted my phone so far and I would like to ask you a solution for my problem. What I would like to do is rooting my phone because I would like to make an app a system app. Afterwards, I would like to unroot back my phone.
What I have read so far is that if I do such a procedure without touching the bootloader (don't even know how to touch it so far) there is "nothing" that can go wrong. True?
Moreover, by not touching the bootloader and by unrooting back I would validate again my warranty. Is this true too?
Thank in advance!

 

[svim]

Oh my, rooting your phone will not be like flipping a switch where you can effortlessly toggle root to un-root,or vice-versa. Wherever you read that '...nothing can go wrong' is very misleading as here in the real world anything can go wrong. When taken to be so trivial, that greatly increases the chance of bricking your S7.

Instead, if you state just which app you want to change into a system app and why maybe someone can suggest a different solution.

 

[Hadron]

Yeah, I'm afraid it's been a long time since unrooting was as simple as deleting one extra app from the system. These days if someone wants to unroot my advice is to reflash the stock software, which would however be self-defeating in your case (as it would overwrite the system and undo the change you wish to make). Even then it's likely to leave some signs that the phone has been modified (especially on a Samsung), so you should not assume that your warranty can be recovered that easily.

In any event, I think you cannot have everything you are asking for: it's not root that would invalidate your warranty, but the act of modifying the system software per se. And even if you could remove all traces of root, the fact that you've added an app to the system means that it is modified (plus Samsungs have various counters to indicate whether the system has ever been modified, and not being a Samsung expert I can't say how easy it is to bypass or reset those).