mobile

Hi everyone! I recently bought a new phone, the Orange nura, that seems to be a version of China mobile m812. I have tried many programs to root my phone (framaroot,Vroot, king root, iroot...) without success and i don´t know what more to do.

The specs are: snapdragon 400, Android 4.4.2, 1 gb RAM, 12 GB ROM, 5.5"

someone can help me with root? Thanks. :o