For everyone that try to root your phone, i root my inew v3 and works great!
You will need to download this program (chinese but its ok)
This is the link i will translate.
Check the grossoshop blog, you have a tutorial.
Enviado do meu x600 através de Tapatalk
I didnt't test yet.
But what i read is ok, only fingerprint dont work.
I see on needarom new ROM Android5.1
You can find it on XDA forum, is an APP