A newer version is available: 1.9.8
Download CIT 1.6.6 for HyperOS
Version page for CIT 1.6.6 (Mar 30, 2026) on HyperOS / MIUI. This APK is for this exact build — do not confuse it with other releases in the history.
CIT is a HyperOS diagnostic application used for testing the hardware components of the device. It checks the functionality of the display, sensors, cameras, microphone, speakers, communication modules, and other internal systems. The CIT interface is usually hidden from regular users and can be accessed through a special combination in Settings or a dialer code. This tool is primarily used in Xiaomi factories and service centers to perform quality control, detect malfunctions, and calibrate hardware.
Before you install
- Android 16
Installation
- Download the APK from the link on this page (or open the Telegram post).
- Allow installs from unknown sources if Android asks.
- Open the downloaded file and tap Install.
- If you hit a signature conflict, uninstall the old app version and try again.
- After install, open the app and confirm the version in its about screen.
Source & authenticity
Files are indexed from public HyperOS / Xiaomi builds and community mirrors. Otree.pro is not affiliated with Xiaomi; the original release and device settings remain authoritative.
CN and Global/EEA/RU builds use different packages and services. Install the region that matches your device firmware, or you may hit signature conflicts.
