Menos mal. Tenia un 4a de un amigo con una China, y ya me veia pidiendo desbloqueos y demas.
Esta ROM, se actualiza poniendola en la raiz de la memoria interna y con el "updater" propio del teléfono, no se si me explico.. ¿?
Edito, Si, según la propia guía del enlace, en la carpeta "downloaded_rom"
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1 Download the latest MIUI ROM file Download here
There is no need to do it again if you’ve already downloaded the latest ROM file.
2 Connect your device to the Windows PC/laptop via a micro USB cable, and copy the ROM file downloaded in Step 1 into the folder ‘downloaded_rom’ in the internal storage of your device.
3 Launch ‘Updater' app on your device：
MIUI 6/7/8：Click the ‘…’ icon at the top-right corner, select ‘Choose update package’, and choose the ROM file you’ve put in ‘downloaded_rom’ in Step 2.
MIUI V5：Press the Menu button, select ‘Choose update package’, and choose the ROM file you’ve put in ‘downloaded_rom’ in Step 2.