How can I rooting a ZTE stack 6.0.1 z799vl I'm looking for a way to root my ZTE stack running 6.0.1 and the model number is z799vl
The easiest way to root any android device is with one of these 1 click root methods:

(I already rooted about 7 devices with these methods.)

https://kingroot.net/

http://www.kingoapp.com/

h ttp://www.iroot.com/

h ttps://www.oneclickroot.com/

More links and info can you find here.