Video Tutorial For Upgrading Rom?

[rgxci]

Hello,

is there anywhere on Youtube/etc. a good and detailed Video how to upgrade for example from Xiaomi Global to xiaomi.eu custom ROM?

I did it last time 9 months ago, and I have no idea how I solved it from the beginning till the end.
Because you always need a new/old ADB, new recovery, and so on.

I use for example xiaomi.eu ROM (MIUI 7) and want to upgrade to (MIUI 8 latest version on Nougat) ... if possible without loosing all data/settings.

Thanks in advance.

 

[bestway]

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