Finally, the first beta version of the MIUI 9 is available to download for the first phone: Xiaomi Mi5. The company has promised that the update would have been available on August 7, and so it was. This ROM is only available for people who registered to the beta testing phase (more than one million people), to help the company find bugs and other kinds of problems in the firmware.
If you are registered to beta testing, you can download the update via OTA, so just confirming a simple notification on your status bar, and the download of the ROM will start and auto install after the completion. If you have a Xiaomi Mi5 and you want to try the MIUI 9, download the official MIUI forum app by heading to this link, go tp the forum, visit the section MIUI9 BETA TEST and log in with the information provided in the app. After you will be subscribed, the staff from the forum will evaluate your daily activity, and if you will be considered a valid tester you will get a message in the forum.
So, from mid-August, you will receive a beta testing code to download the new ROM, and you will have to install WeChat (a messaging chat among the most used in China) and join the official channel to receive it. MIUI 9 contains many improvements and new features inside. It has a new CPU acceleration system which makes the user experience much better. It can prioritize the single app that the user is using in a certain moment, and it can make it faster and smoother. The new user interface is able to provide more free RAM than the previous version, a comparison has been made with Xiaomi Mi6 and it performed much better with the 9th version of the UI.