Android Rooted?

[JulianM]

Please try "towelroot" to root your device, but I think it will not work.
- https://towelroot.com/ (or directlink)

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You can even try "Kingoroot" / "Kingoapp" as another possibility.
- https://www.kingoapp.com/
- [VIDEO] Root ANY Android Device 5.1.1, 5.1, 5.0.2, 4.4, 4.3 4.2.2 Lollipop KitKat JellyBean One Click 2015 | YouTube.com

I was able to remove Kingoroot app and their bloatware with a few tricks to replace it with SuperSU.
- How to Remove/Replace Kingroot (KingUser) with SuperSu - W0lfDroid

But the easiest way to replace Kingoroot with SuperSU was the following app (for 4.36 Euro):
- Super-Sume-Pro – Android-Apps  auf Google Play

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KingoApp has also installed a few strange apps, so, I advise you to try the following software, it's called Framaroot and it's really popular:
- [ROOT] Framaroot, a one-click apk to root some devices | XDA-Developers.com

That's just a "try & error" game...

Good luck!