Make sure the phone has entered the Recovery menu, if not, please refer to the last section in the previous step.
Operate on the phone
In the Recovery menu, enter "install zip from sdcard" (use VOLUME to select, and DIAL to confirm) , then go to"choose zip from sdcard"
Choose to enter MIUI ROM installation package copied into the root directory of SD card in the first step. Choose the option started with “Yes" in the next screen.
Now the ROM flashing begins!
When the alert "Install from sdcard complete." appears on the screen, it means the flashing has been completed.
Press POWER to return to the Recovery root menu, select "reboot system now", and press DIAL to confirm.