The sudden appearance of a system window with the inscription Main Menu on the screen of a Xiaomi smartphone can cause panic in any user. Most often, this interface is an engineering debugging menu or Factory Test Mode, designed for employees of service centers.
Despite the frightening appearance of many buttons and tests, the situation is not critical in most cases. MIUI and HyperOS have built-in protection mechanisms that do not allow you to easily break your phone through this menu without special knowledge.
In this guide, we will discuss safe exit methods, ways to eliminate cyclical window appearance, and ways to prevent re-failure. It is important to act consistently so as not to activate hidden features that may require data resetting.
Reasons for the appearance of the engineering menu
The main reason Factory Mode is activated is a random combination of physical buttons. On Xiaomi, Redmi and Poco smartphones, the test mode is often reserved for running the test mode while simultaneously pressing the volume and power button when the screen is on or while booting, this is done for rapid diagnosis by technicians in the service.
The second common cause is software conflicts: Installing third-party button management applications, macros or root-enabled programs can emulate clicking the right combination, and a failure can occur after a failed system update or damage to Android system files.
⚠️ Warning: Do not click blindly on the buttons in the window that opens, especially those marked as "Write", "Burn" or "Clear" and this may result in a reset. IMEI screen-calibration.
Sometimes the Main Menu window comes out because the volume button sticks. If the case presses on the key or there is moisture inside the case, the phone may perceive this as a command to enter the diagnostics. Check the mechanical integrity of the buttons before the software solution.
Basic methods of exit
The easiest and safest way to leave the test menu is to use the standard interface tools. Most MIUI firmware versions have a Back, Return or Quit button in the corner of the screen or at the bottom of the window.
If the program button doesn't respond or the window is blocking the entire screen, try a software reboot, press the Power button and hold it for 10-15 seconds, and the device should vibrate and forcefully reboot, ignoring the running testing process.
What to do if the buttons don’t work?
In situations where the standard reboot does not help and the menu appears immediately after turning on, a deeper approach is required: eliminate the physical impact of the buttons. Remove the protective case, wipe the side faces of the device and make sure that the volume buttons are clear and not clamped.
Diagnostics through Engineering Menu (CIT)
If you've had to interact with the interface, it's helpful to know that you're in the CIT, which is a set of hardware testing tools that you can use to check the vibrator, the speakers, the microphone and the sensors.
However, it is important for the average user to be able to distinguish between safe and dangerous tests, and here is a table of the main features that you can encounter in Main Menu:
| Name of the test | Function | Security |
|---|---|---|
| Version | Shows the version of the software and the date of assembly | Safe. |
| TouchPanel | Screen sensitivity check | Safe. |
| Camera | Camera test | Safe. |
| EEPROM Write | Recording data in memory | Dangerous. |
| Clear eMMC | Complete Memory Cleanup (Wipe) | Dangerous. |
As you can see from the table, most visual tests are non-threatening. The danger is items related to data recording or memory cleaning. Never initiate Clear eMMC or Factory Reset processes from this menu without a backup.
To exit a particular test inside the CIT, it is usually enough to press the Fail or Back button at the bottom of the screen. If you accidentally run a sound or vibration test, completing it will return you to the main diagnostic menu, from where you can already exit completely.
Elimination of cyclical window appearance
When the Main Menu window appears continuously after each reboot or unlock, the service needs to be disabled, which may be caused by the virtual command sticking, and the menu recovery can be used to solve the problem.
Try booting into Recovery mode. Turn off your phone and press Volume+ and Power at the same time. In the menu that appears (volume button management, power button selection), select Reboot and then Reboot to System. This often resets the erroneous test launch flag.
☑️ Actions in cyclic Main Menu
If the software restart didn't work, maybe the problem is with a particular application. Think about the programs you've installed recently, or the button-setting utilities, or the game optimizers, or the memory-cleaning applications, and removing suspicious software can solve the problem.
⚠️ Note: If the menu comes out immediately when you turn on the phone before the Mi logo appears, there is a high probability of physical closure of the button plume or moisture.
Resetting settings as a last resort
When none of the softer methods work, the radical but effective way is to completely reset your settings (Wipe Data), which will delete all user data, photos and contacts, so you must first make a backup to the Mi Cloud cloud or to your computer.
To perform the reset, go to Settings → About Phone → Settings Reset → Erase all data. If the menu does not allow you to do this because of a constantly pop-up window, reset via Recovery Mode (Wipe Data).
Once reset, the phone will return to factory status, if the problem was caused by a software conflict or an error in the system settings, it will disappear, and if the problem persists even after reset, it indicates a hardware malfunction.
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A complete data reset eliminates 95% of the software errors associated with the cyclical appearance of system menus, but takes time to recover the data.
Prevention and hardware diagnostics
To keep the problem from returning, you should do prevention. Regularly clean the side of the smartphone from dust and dirt that can accumulate around the buttons. Use protective cases that do not press excessively on the volume keys.
Also keep an eye out for system updates. Xiaomi engineers periodically release patches that fix bugs in the MIUI shell. Go to Settings → About the phone and check for updates. The current version of the software provides better stability of system components.
If you notice that the volume button has become "cotton", fails or, conversely, does not fully click, this is a direct way to repeat the problem, in which case you need to replace the button plume at the authorized service center.
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Use compressed air to blow out gaps around the buttons – this will help remove fine dust that causes contacts to stick.