How to install MIUI firmware? The installation process on almost all firmware is the same.
1) Copy to the root of the memory card the archive with the firmware and everything that is attached to it (patch, crack).
2) Restart the phone and go to the xRecovery menu.
3) Choose
Factory Reset (full wipe) and confirm the action.
4) Choose
Wipe Cashe Partition and confirm the action.
5) Choose
Advanced option and there
Wipe Dalvik Cache and confirm the action.
6) Go back to the main menu and select Install custom zip, click Choose custom zip from sdcard and select our archive with firmware.
Note: If you want to install a crack, patch, or any addon, immediately (without leaving xRecovery) repeat step 6.
If you install the crack, patch, or any addon later (after reboot), then once again perform the following points:4) Choose
Wipe Cashe Partition and confirm the action.
5) Choose
Advanced option and there
Wipe Dalvik Cache and confirm the action.
6) Go back to the main menu and select
Install custom zip push
Choose custom zip from sdcard and choose our archive.
More information about MiUI can be found in the topic.
Sony Ericsson Xperia X10 MiUI Firmware. The material is taken from there.