[Q] How to transfer apps data from S4mini to G3?

Yesterday I bought LG G3 to my wife, so question is how to transfer application's data from Samsung S4 mini to new LG G3?

SMS and Call log were simple ...

But I'm fighting with application's data for last 24 hours.... but nothing :crying:
Conditions:
- S4 mini > rooted
- LG G3 > new, not rooted and I do not want to void warranty first day
- SMS and Call log successfully transferred
- all apps installed without their data

I already tried:
- LG Backup - but it does not backup apps, neither app's data
- Titanium Backup - root required
- FULL BACKUP - root required
- Easy Backup & Restore - root required
- App Backup & Restore - root required
- Ultimate Backup - root NOT required, but it backup only app's apks, but not app's data, so seems like the root required too

- Helium - root NOT required
> first problem - run on S4mini and made backup of apps and app's data, but folder "user data" is empty
> second problem - when I started it on G3 .. I got only popup "you have to active it on PC"? Why I don't have same popup on S4mini?
> third problem - I installed Carbon / Helium Desktop does not see the G3, It stated: Connect your mobile via USB
> forth problem - The "USB debugging" is allowed on G3, but popup "you have to active it on PC" is still there

I don't want void warranty first day, also it's my first experience with LG mobile.
Questions:
- if I would root G3 is it possible to un-root it, so it won't be possible to find that G3 was rooted???
- how to transfer app's data without root???

Thank you very much