Step by Step Rooting your Z Ultra
I won't be responsible for getting any damages to your phone.
You'll have to connect to a proxy server due to the application requires a Chinese IP
Step 1 : Download and install 360 One-Root - http://down.360safe.com/360Root/360RootSetup.exe
Step 2 : Go into Control Panel, Internet Options, Connections, Lan Settings.Type in 126.96.36.199 in the Address box , then 81 in the port box,at last,tick both of the boxes under proxy server and press ok.
Step 3 : Launch 360 One-Root , Press the green button (一鍵ROOT)
Step 4 : Wait and Enjoy a cup of tea. If the root process fail the first time, DON'T PANIC and repeat Step 3 to 4 Again.
Step 5 : Reboot!!!!! Or you won't be able to update su binary
P.S. Enable USB Debugging
If you have a Security lock , please remove it before trying to root.
Feel free to repost this and Sorry for my Bad English.