Dispositivos Xiaomi:
1. Actualización vía OTA.
2. App Updater - 3 puntos (menú) - Seleccionar paquete de actualizaión y elegimos la rom

Otros dispositivos oficiales
1. Vía OTA
2. Descargamos la rom y la renombramos a update.zip. Vamos al MiRecovery y actualizamos desde ahí

Otros dispostivos no oficiales y ports
Descargamos la rom y flasheamos desde el recovery CWM
Si venimos de otra rom que no sea de xiaomi.eu, lo mas recomendable es hacer lo siguiente:
Wipe data/ factory reset
Wipe cache
Advances - wipe dalvik cache

[Phone]
Optimization - Unified animation effects of folding/unfolding T9 dial pad (07-01)

[Contacts]
Fix - FC error or no response issue when calling back/replying messages to unknown numbers (06-26)
Fix - Marking unknown numbers might cause FC (07-01)

[Messaging]
New - SMS syncing status will be displayed when pulling down on SMS list page (06-29)

[Lockscreen, Status Bar, Notification Bar]
Optimization - Use standard Android notification style for USB connection (06-29)

[Home screen]
Fix - Global search could rotate upside down when screen rotate was disabled (06-29)

[Gallery]
Optimization - Adjusted Mi Note Gallery to display four images in each row (06-26)
Fix - Sometimes browsing large images in People album caused FC error (06-30)
Fix - People albums' covers did not update timely (06-30)
Fix - Videos taken with screen locked could not be played normally (06-30)

[Music]
New - Added music copyright information in Settings page (06-29)

[Weather]
Optimization - Do not allow to pull down to refresh again during the process of refreshing (06-29)

[Settings]
New - Users can mark if a WLAN is mobile hotspot after connecting to it (06-30)