Xiaomi HyperOS 4: Complete Guide to Launch, Eligible Devices, and Zero-Legacy Features

Launch & Rollout Timeline

• China unveiling: July–August 2026, likely with the Xiaomi 18 series .
• Beta program: The first closed beta batch in China reportedly covers the Xiaomi 17 series and Redmi K90 series .
• Stable China rollout: Expected to begin in September 2026 .
• Global rollout: Stable global availability is expected to start in October 2026, beginning with the Xiaomi 17 and 15 series . Some reports suggest the global version may arrive in November–December 2026 .
• Official roadmap status: Xiaomi has not yet published a detailed device-by-device public rollout plan. Current device lists are based on leaks, tipster reports, and aggregated compatibility roundups .

Eligible Devices

No official final master list has been published. The following is based on aggregated leaks and tipped compatibility reports covering roughly four generations of devices across Xiaomi, Redmi, and POCO .

Xiaomi (flagships & foldables)

• Xiaomi 18, 18 Pro, 18 Ultra, 18 Ultra Leica Edition (expected launch devices)
• Xiaomi 17, 17 Pro, 17 Pro Max, 17 Ultra, 17 Ultra Leica Edition
• Xiaomi 15, 15 Ultra, 15T, 15T Pro, 15S Pro
• Xiaomi Civi 5 Pro, Xiaomi MIX Flip 2
• Xiaomi Pad 7 Ultra, Pad 7S Pro 12.5, Pad 8, Pad Mini

Redmi

• K-series: Redmi K90, K90 Max, K90 Pro Max; K80, K80 Pro, K80 Ultra; K70, K70 Pro, K70 Ultra; K60 Ultra
• Note series: Redmi Note 15, Note 15 4G, Note 15 Pro, Note 15 Pro 4G, Note 15 Pro+, Note 15 Special; Redmi Note 14 4G, Note 14 Pro, Note 14 Pro+, Note 14S
• Turbo series: Redmi Turbo 5
• Number series: Redmi 15, 15 5G, 15A, 15A 5G, 15C, 15C 5G, 15R 5G
• A series: Redmi A7, A7 Pro, A7 Pro 5G
• Tablets: Redmi Pad 2, Redmi Pad 2 4G

POCO

• F series: POCO F8 Ultra, F8 Pro, F7 series (F7, F7 Pro, F7 Ultra), F6 series
• X series: POCO X8 Pro, X8 Pro Max, X7 line
• Other: POCO M7, POCO M7 Plus 5G, POCO C85, POCO C85 5G

Notable potential exclusions

• Redmi Note 14 5G — The standard 5G variant of the Note 14 series is absent from the cited Redmi Note eligibility lists, which instead mention the 4G, Pro, Pro+, and 14S variants .
• POCO M7 Pro 5G — It does not appear in the cited POCO eligibility lists, meaning its inclusion remains unconfirmed .

Key Features

"Liquid Glass" UI

HyperOS 4 is reported to introduce a complete visual overhaul dubbed “Liquid Glass.” Multiple leaks from tipster Digital Chat Station describe transparent surfaces, fluid animations, depth effects, and bounce effects across home screens and menus . The design is built on three pillars: transparent surfaces, multi-layered depth, and subsurface refraction . Reports also mention a Leica-inspired color system with themed icons and shadow/light effects .

"Zero-Legacy" architecture

HyperOS 4 is described as the first “zero-legacy” version of Xiaomi’s operating system . This means Xiaomi is removing all residual code accumulated from MIUI 1 through HyperOS 3 — a process that began with HyperOS 3.1, which removed the MIUI SDK from modules like Weather and Gallery . In HyperOS 4, the backward-compatibility layer is expected to be eliminated entirely .

Rust-rewritten core apps

Core system apps — including Settings, Phone, Messages, Gallery, and File Manager — are reportedly being rewritten from scratch using the Rust programming language . Rust is valued for its memory-safety guarantees, which reduce crashes and improve security . Multiple reports confirm this shift across key modules .

Flutter-based UI rendering

Xiaomi is adopting the Flutter UI framework for system app rendering, aiming for more consistent interfaces across different device types and screen sizes . The Flutter engine is already used in the new Weather app as of HyperOS 3.1, and HyperOS 4 will extend this across more system apps .

Expanded AI capabilities

HyperOS 4 is expected to include broader AI-driven system optimizations. Xiaomi has confirmed plans to integrate its MiClaw AI assistant more deeply into the operating system, though specific features are still being detailed in reports .

Current Uncertainty

• Official naming: Xiaomi has used the phrase “new generation of OS” in public statements rather than explicitly calling it “HyperOS 4” .
• Final device lists: The eligibility lists above are based on leaks, tipster reports, and compatibility roundups — not an official published roadmap .
• Rollout timeline: Some sources place the reveal in the broader summer 2026 window; the July–August window is the most commonly cited .
• Beta recruitment: Xiaomi has not yet formally announced a public beta program for HyperOS 4 .