Coming from a treble rom to stock.

Feb 27, 2019
Guys I'm using Havoc rom and want to start using the miui eu, reading some posts I see that is not possible to return to stock without fastboot flash but if I have backup of vendor partition it's possible.

So I have the vendor backup from the last miui global stable, can I'm just use this and flash the miui eu or have to do the fastboot first, and if I have to do the fastboot it's better flash which stock rom?