Imagine getting a very early peek at a smartphone OS still being stitched together. Exciting? Yes. Risky? Also yes. Xiaomi has just opened recruitment for HyperOS 4 beta testers in Global and EEA markets, and the company wants enthusiastic users to help shape the next chapter of its software.
Who can join right now
Enrollment has begun for three flagship models: the Xiaomi 17 Ultra, the Leica Leitzphone by Xiaomi, and the Xiaomi 17. To apply, open the Xiaomi Community app, tap Me, choose Beta testing, then Recruiting test, and complete the questionnaire.
Some beta builds will require Xiaomi Account verification. If your application is approved, the HyperOS 4 beta will arrive over the air. Think before you proceed. Beta software can be buggy and is not recommended for primary devices.

Worried about losing stability? There is a catch. If you want to return to the stable HyperOS 3, you cannot simply roll back via settings. Reverting requires manually flashing the firmware, a process that demands time and technical care.
More phones added on September 17
Recruitment expands on September 17 to include the Xiaomi 17T, Xiaomi 17T Pro, Xiaomi 15, and Xiaomi 15 Ultra. That staggered approach lets Xiaomi broaden testing while focusing initial feedback on a smaller set of devices.
Why join at all? If you enjoy trying unfinished features, helping squash bugs, and influencing polish before public release, this is a direct line to the development process. If you need a stable daily driver, you might want to sit this one out.
The process is straightforward, but not without tradeoffs. Short-term inconvenience can lead to long-term gains for the broader user base. Just be ready for a few surprises along the way.




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