Xiaomi Mi 11 Ultra has received relevant test pushes, the version number is MIUI 12.5 21.9.25 development version beta, the biggest highlight of this version of the system is the upgrade to the Android 12 major version.
It is worth mentioning that the update log also shows that this update has improved the stability of the system, while also optimizing the fluency of the system, which may be expected to improve the performance before MIUI 12.5.
It should be noted that the official reminder that this update is an Android cross-version upgrade, in order to reduce the risk of the upgrade, it is recommended to back up personal data in advance.
This update takes a relatively long time to start and load, and performance and power consumption issues such as heat may occur within a short period of time after startup.
Some third-party applications have not been adapted to their own versions, which will affect normal use. Please be careful to upgrade.
It is reported that Google previously said that Android 12 improves the entire underlying system and can reduce the CPU time required for core system services by 22%.
The system server’s use of the large core has also been reduced by 15%, which will bring smoother and faster responses during use.
In addition, in terms of privacy protection, which is increasingly valued by users today, Android 12 has also been upgraded to ensure that users have more understanding and more restrictions on which applications are accessing their data.
James Chow 
Rupesh 
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Gaosi Tai