Xiaomi has launched the stable version of HyperOS 4 in China, bringing performance upgrades through its Xiaomi HyperCore kernel. The rollout currently targets 12 domestic device models while the company expands its global beta testing program for international users.
Xiaomi Upgrades Kernel Performance
Xiaomi has added two key technical features to the Xiaomi HyperCore system kernel: workload calculation and memory pre-loading. These additions aim to optimize resource management and accelerate application launch times. Building on the foundation introduced with HyperOS 2, the updated architecture features an independent application operating environment inside the HyperCore OS, allowing the system to schedule and manage hardware resources directly from fundamental operational levels.
Testers participating in the preview phase reported that system speed improved noticeably compared to earlier software versions. Movement across interface pages became faster and more responsive, while occasional stuttering observed in past iterations largely receded. Alongside performance metrics, the visual presentation underwent a streamlining process.
Engineers removed decorative animations and cluttered visual elements to deliver a cleaner layout. Several users noted that these adjustments reduced visual fatigue during extended daily smartphone sessions.
China Sees Initial Device Rollout
The initial stable distribution wave covers 12 specific device models and editions within the Chinese market. Eligible flagship devices include the Xiaomi 17 Ultra, Xiaomi 17 Ultra Leica Edition, Xiaomi 17 Pro Max, Xiaomi 17 Pro, and Xiaomi 17. The Redmi lineup features the Redmi K100 Pro Max, Redmi K100 Pro, Redmi K90 Pro Max, its Champion Edition, and the standard Redmi K90, alongside the Xiaomi Pad 8 Pro and Xiaomi Pad 8 tablets.
Internal beta testing in China began on August 14 before transitioning to the stable release. Registration for those internal tests closed on October 14, following a confirmation notice issued through the Xiaomi community platform.
Not all qualified hardware receives the software simultaneously. Devices such as the Xiaomi 17 Max, Xiaomi 17T Pro, Xiaomi 17T, Redmi K90 Max, Redmi K90 Ultra, Redmi Turbo 5 Max, and Redmi Turbo 5 are scheduled for subsequent rollout phases extending through the end of October. Meanwhile, foldable units like the Xiaomi MIX Flip 2, alongside devices from the Xiaomi 15 family and select Redmi K80 models, are slated for a separate deployment window opening by mid-November.
Global Beta Expands to International Markets
Chinese users began receiving stable notifications on October 15. Xiaomi has not yet published an official release date for the stable global firmware, though a global beta testing initiative targeting Global and EEA ROM users was established in September.
Early global beta testing initially included the Xiaomi 17 Ultra and Xiaomi 17. The company subsequently expanded the international preview pool into a second batch incorporating the Xiaomi 15, Xiaomi 15 Ultra, Xiaomi 17T, and Xiaomi 17T Pro, building upon the initial foundation introduced with HyperOS 2.
