Upgrade Xiaomi.eu

[Ocaselvatica]

My Mi4c came to me whit MIUI 8.1 by xiaomi.eu 6.8.25 dev and chinese recovery.
How can I upgrade the xiaomi.eu rom? I can simply install zip file from chinese recovery or I need to install TWRP?

 

[Ocaselvatica]

Mani tx for the reply. I suppose my BL is unlocked because of the xiaomi.eu rom installed. I'm true?
Tanks for your time, Daniele

 

[Ocaselvatica]

..many tx!