Mi phone system update failure (OTA update)

Reason:
The process of system update:
1. The mobile phone obtains the re-installation package from the server and downloads it.
2. After the download of the package, the server will verify the package online.
3. After the package has been verified, reinstall the system.
Solution:
1. The possible reasons and solutions for the failure of downloading the re-installation package are as follows:
(1) Sign into Xiaomi community and check the latest system version and make sure that the flash package has not stopped pushing.
(2) The current system version of the mobile phone is too old.
(3) The network is not connected to the server because of network reasons or other reasons, so it is suggested to replace the network.
(4) If the above methods don’t work, select "download the latest version of the full package" or "manually select the installation package" to upgrade the system in the system update. For older system version it is recommended to clean up all data to avoid data conflicts.
2. Re-installation package verification failure
Mobile phone system update (OTA update) or other means require the verification of the re-installation package to ensure that the package is suitable for this model and official. This error prompt typically occurs when manually selecting an installation package, and rarely occurs for OTA upgrades.
3. Re-installation failure
(1) The current system version of the mobile phone is too old.
(2) If restarting the phone doesn’t work, select "download the latest version of the full package" or "manually select the installation package" to upgrade the system in the system update (for older system version it is recommended to clean up all data to avoid data conflicts).
Regardless of the circumstances in which the system update fails, if the above methods don’t work, phones with BL lock unlocking permissions or those willing to apply for unlock permissions can use Xiaomi Assistant or Mi flash tool to reinstall.
Note:
1. Mobile phone using third-party software Root may lead to system upgrade failure. It is recommended to restore factory setting or direct install the latest system version.
2. Before cleaning data, be sure to effectively backup the mobile phone data (cloud service synchronization is recommended).
3. The "manual selection installation package" option is hidden in the latest stable version of MIUI 11. Tap on the "11" figure of the system update interface ten times. When the system suggests that "the system update extension function has been turned on", tap on the three-point button again.