Prerequisites: 1. Android 5. 0 and above. 2. Arm cpu. 3. You phone must be rooted. Update will not upgrade the openwrt image, please reboot, clear data, then run Android Openwrt. Usage about Android Openwrt: One look is worth a thousand words：. Installation on Android 9. 0. Uninstall and reinstall. Features list of Android Openwrt.