Default Discovery V6

Hello pals, I'm new in android community so I'm sorry if this topic is in wrong section.
I need an advice where i can download new android for dual sim mobile phone Discovery V6. There is too much in builded apps in Chinese in the phone.
I still don't know where i can find firmare for it.
Now running Android is 4.2.2
The phone is Aur discovery
Tnx