The engineering menu (called the mine menu) on Xiaomi Redmi 9 is often random β just press the wrong key combination or choose the wrong item in the service settings. The problem is that this menu is not designed for ordinary users: there is no usual MIUI interface, and navigation is carried out through low-level commands. If you are in this menu and do not know how to get out of it, do not panic. In this article, we will discuss 5 proven ways to return to standard mode of operation of the smartphone, including methods without loss of data and with a complete reset.
It is important to understand that the mine menu on Redmi 9 can look different depending on the firmware version and regional modification (e.g. global MIUI or Chinese). Some menu items can be in English, Chinese or even code names (e.g. Item Test, Version, Reboot).
1. Standard output through hardware buttons
The easiest way is to use physical buttons on your smartphone, which works 80 percent of the time if you don't have a lock on the menu at the firmware level.
- π Reboot: Press the Power button for 10-15 seconds until the screen goes out. After automatic restart, the phone should start as normal.
- π± Button combination: Press and hold power at the same time + Increase the volume for 8 to 10 seconds, and this force the device to restart.
- π Back button: In some versions of the mine, the back button (bottom touch or physical) can act as an exit. Press it repeatedly for 3-5 seconds.
If you re-enter the mine menu after the reboot, it means that the engineering testing mode is activated in the settings, in which case you will need to reset the parameters (more about this in the next section).
β οΈ Note: On Redmi 9 with custom firmware (such as LineageOS or Pixel Experience), the button combination may differ. + Volume appears Fastboot menu, select Reboot System Now with volume buttons and confirm the choice of power button.
2. Exit through reset settings (without data loss)
If the hardware buttons donβt work, try resetting the settings for the engineering menu only without affecting user data.This method is suitable for Redmi 9 on the official MIUI (versions 12-14).
Instructions:
- In the mine menu, find Restoration or Reset Settings (maybe in Chinese: ).
- Choose Reset Test Mode or similar (not to be confused with Factory Reset!).
- Confirm action. The phone will reboot as standard.
If there is no such item, try an alternative path:
Find Version or Software Info|Select Clear Test Data or Exit Test Mode|Confirm the choice of the Menu button or OK|Wait for the reboot (up to 2 minutes)-->
| Menu item (English) | Menu item (Chinese) | Action. |
|---|---|---|
| Restoration | Resetting test parameters | |
| Exit Test Mode | Exit from engineering mode | |
| Clear Test Data | Clearing Temporary Test Data | |
| Reboot System | Reboot to normal mode |
β οΈ Note: Some firmware may not have Reset Test Mode, in which case, do not select Factory Reset, which will result in a complete reset of the phone, deleting all data (photos, contacts, apps).
3. Forced reset to factory settings
If the previous methods didn't work, you'll have to reset hard, which will delete all the data on the phone, but it'll return to working order. On Redmi 9, there are two ways to do this.
Method 1: Through the Mina menu
In the engineering menu, find:
- π§ Factory Reset (or ) β confirm.
- π Wipe Data β Wipe All Data β Yes.
Method 2: Recovery Mode
If the menu miner does not respond:
- Turn off the phone (hold power for 20 seconds).
- Press Power + Volume Up until the Mi logo appears.
- From the Recovery menu, select Wipe Data β Wipe All Data.
- After reset, select Reboot.
It takes 3-5 minutes to reset, and after the reboot, the phone will be like new, and you'll need to reset MIUI.
π‘
Remove before resetting SIM-card and memory card, if installed, will speed up the process and reduce the risk of data corruption on the drives.
4.Exit through ADB (for advanced users)
If you have access to a computer, you can exit the mine menu using Android Debug Bridge (ADB), a method that is suitable for Redmi 9 with USB debugging enabled (if it has been activated previously).
Instructions:
- Connect your phone to your PC through USB-cable.
- Open the command line (Windows) or the terminal (Mac/Linux).
- Enter the commands in order: adb shell am start -a android.intent.action.MAIN -c android.intent.category.HOME or alternatively: adb shell input keyevent 3 (emulates the press of the Home button).
If the commands donβt work, try the forced reboot:
adb rebootβ οΈ Note: Redmi 9 with a locked bootloader) ADB It may not have sufficient rights to execute commands, and it will not work.
What if the ADB canβt see the device?
5. Contact the Xiaomi Service Center
If none of the methods worked, you have to contact an authorized service center.
- π The phone is locked at the bootloader level (bootloader).
- π± The menu is cyclically displayed after each reboot.
- π§ Errors like Fastboot mode or No command are displayed on the screen.
The service center specialists:
- Sew the phone through EDL-mode (emergency firmware).
- Resets via Mi Flash Tool.
- Check the hardware (for example, the failure of the Loudness button, which may accidentally activate the menu).
The cost of the service in official centers of Xiaomi is from 1000 to 2,500 rubles (2026), while the warranty on the phone is maintained if there was no mechanical damage.
π‘
Before visiting the service, back up your data via Mi Cloud (if your phone has ever connected to the Internet). Even if the screen does not respond, specialists can extract data through EDL or chip-off methods (for an additional fee).
Frequent Mistakes and How to Avoid Them
Many Redmi 9 users make the typical mistakes when trying to exit the mine menu.
- π« Remove the battery: The Redmi 9 has a non-removable battery, and trying to remove it will damage the plumes.
- π« Click everything: There are items on the engineering menu like Format Data or Erase All that erase the firmware partition".
- π« Use unofficial firmware: Install custom Recovery (for example, TWRP) Without unlocking the bootloader will lead to locking the phone.
Also avoid:
- π Charging connections in the mine menu: On some firmware, this can cause a crash and cyclic reboot.
- πΆ Mobile Network Turning On: In test mode, the phone can automatically send data to Xiaomi servers, which will result in a lockdown. IMEI.