Xiaomi plans a big change with HyperOS 4. The company removes old MIUI code completely. This makes the system faster and more stable. HyperOS 4 arrives in August 2026. It becomes the first “Zero-Legacy” version.
HyperOS 4 To With Launch Zero-Legacy Protocol
Xiaomi starts cleaning old code in HyperOS 3.1. It removes MIUI SDK from Weather and Gallery apps. It deletes all legacy code from MIUI 1 to HyperOS 3. The system gets rid of slow function calls and old dependencies. This creates a fresh operating system. It improves speed and reduces bugs.
Key changes:
- Removes MIUI backward compatibility layer
- Uses only HyperOS SDK in all modules
- Deletes over 10 years of old code
- Makes updates faster and more stable
Flutter And Rust For Better Apps
Xiaomi rewrites core apps with Flutter and Rust. HyperOS 3.1 tests this in Weather app. HyperOS 4 uses these tools fully. Flutter gives smooth UI. Rust adds speed and safety. Old HyperOS users lose access to new app versions. This stops backward compatibility for old phones.
Key features:
- Flutter for standard UI rendering
- Rust for secure and fast core code
- Modular apps that update independently
- Better stability on all devices
Flagship phones get small gains. Budget phones see big speed boosts. Xiaomi ends old code problems. It promises the most stable experience in Xiaomi history.
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