Hidden system partition, often called an injenk or CIT-In a mode, it can be a nasty surprise for the owner of the smartphone, usually when randomly set specific codes in a call or try to self-diagnose the device. The screen changes its usual appearance, incomprehensible lines with technical data appear, and the user has a natural fear of breaking the software.
In fact, you shouldn't panic too early, because the engineering menu is designed by the developers to test the hardware, and it allows you to check the display, speakers, sensors and other modules, but you don't have to be there all the time, and in some cases, activated tests can interfere with normal operation of the gadget, for example, constantly vibrating or making sounds.
In this article, we will take a look at all the current ways to leave this mode. We will look at standard exit methods, forced reboot and actions when the system stops responding to touch. Understanding the structure of the menu will help you not only solve the current problem, but also better understand the capabilities of your Xiaomi or Redmi.
The concept of the engineering menu and the reasons for its activation
The Engineering Mode, or CIT, is a hidden partition of the Android operating system adapted by manufacturers for factory testing. Unlike the normal user interface, it doesn't have any extra jewelry, and all functions are aimed at checking the hardware, and this mode is often activated automatically when you enter secret combinations like ##6484## or ##4636##.
The main purpose of this partition is to allow technicians in the factory to quickly verify that all components are in good condition before packaging, and for the average user, access is not often required, but knowing that it exists is useful in diagnosing malfunctions. If your microphone is not working, then CIT-You can run a sound recording test and understand if the problem is a software failure or physical damage.
β οΈ Warning: Avoid changing parameters that you don't know the value of when you're on the engineering menu. Incorrect setting of communication frequencies or screen calibration can cause the device to work in an unstable way.
There are several different kinds of menus, one is the classic hardware testing menu, where each item corresponds to a specific module, and the other is the phone information and statistics menu, which is often confused with a full-fledged ginger, and exit from them can be done differently, but the basic principles of navigation remain similar for most models of the brand.
Standard methods of exit through the interface
The easiest and safest way to leave the technical section is to use the built-in interface controls. In the vast majority of cases, developers have provided an obvious button to complete the test session, usually located at the bottom of the screen or at one of the corners of the display, called Back, Exit or simply a cross.
If you're inside a particular test, like a vibration or screen color test, you have to complete the current procedure first, often by pressing the volume button or tapping the screen, and then a menu with the test results will appear, and only after the active process is complete does the full exit button become available, and ignoring this step can cause the exit button to be inactive.
- π Find the βQuitβ or βExitβ button in the lower right or left corner of the screen and click on it.
- π Use the system back button on the navigation bar or swipe gesture if full screen control is enabled.
- π Try pressing the Home button to roll back the test app and return to the desktop.
Some versions of MIUI or HyperOS may have minimalist interfaces. If you don't see the explicit buttons, try swiping from top to bottom -- sometimes there's a control panel with a finish button, and you should also look at the top of the screen, where you can have a three-dot menu or a gear that hides the exit option inside.
Forced resetting of the device
In situations where the interface has stopped responding to touch and the exit button is missing or not working, the only right solution is a forced restart, which is completely safe for modern Xiaomi smartphones, since it is similar to taking out the battery on older phones.
To do this, you need to press the physical Power button and hold it for a long time, the standard interval is 10 to 20 seconds. At some point, the screen will go out and you will feel a short vibration, which is a signal that the device is turned off, and then you can release the button and wait for the brand logo to appear.
βοΈ Hard reset algorithm
If a single-button combination doesn't work, as happens on some locked-screen models, try pressing the on and Volume Up button at the same time. Hold them until the device vibrates. This method is often used to enter Recovery mode, but with a short hold (until the logo appears), it simply reboots.
β οΈ Warning: Donβt be afraid if the phone requires input after turning on PIN-It's a standard Android security measure that has nothing to do with a breakdown.
Access to the Recovery and Fastboot menu
Sometimes random user actions can lead to even deeper system partitions, such as Recovery Mode or Fastboot. This happens if the volume buttons were accidentally pinched during the reboot. Although this is not exactly an engineering menu in the classical sense, users often confuse these states.
In the Recovery menu, which usually has a black background and text of different colors (often orange or blue), navigation is done with volume buttons, and the choice is with the power button. You need to find the Reboot or Reboot to system. The use of navigation buttons is mandatory here, since the touch screen in this mode is usually disabled.
| Regime. | It looks like | Management | Action for exit |
|---|---|---|---|
| Recovery | Black screen, text, logo Mi | Volume buttons + Power | Select Reboot to System |
| Fastboot | Image of a hare in a uΕ‘anka | Power button (long) | Hold the Power 10-15 seconds |
| CIT/Engineering | Test list, white background | Sensor/Buttons | Quit button or Reboot button |
Fastboot mode, recognizable by the characteristic image of a rabbit in an ooschank repairing an android, often scares newcomers. Once there, you don't have to press anything randomly. Just press the off button and hold it for about 15 seconds. The screen will go out and the phone will start its normal boot. No data is deleted.
What to do if your phone is stuck in a reboot cycle?
Solving problems with hanging and sensor
One of the common problems with being on the engineering menu is the touchscreen failure, which can happen if you accidentally run a screen calibration test or touch input that intercepts control, and in this state, the taps either don't register or they don't work correctly, making it impossible to press the exit button.
If the sensor ignores touch completely and the volume buttons don't change menu items, you have to rely on physical buttons. Try briefly pressing the lock button. On some versions of MIUI, this action can unlock the control or output the lock menu, after which the sensor will start working again. If this doesn't work, the only option is the reboot button combination described above.
If the screen reacts but the coordinates float (press in one place and react in another), you can try using the external periphery. Connect a normal computer mouse to your smartphone via the OTG adapter. The cursor will appear on the screen, and you can safely hover it on the Quit button and exit the test mode.
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If the sensor is partially working, try quickly pressing the Home button or swiping to call Task Manager and close the CIT application from there.
Prevention of accidental entry into test mode
To avoid accidental hitting the engineering menu in the future, it's worth understanding exactly how this happens. Most often, children who pick up a phone for games, or random taps in their pocket if the screen is not locked. Secret codes begin and end with an asterisk or a grille, so locking the screen is the first line of defense.
Also be careful when using memory cleanup or phone speeding apps that may have hidden diagnostic features, some such programs may request special permissions or enter commands in the background, check the list of recently installed apps regularly, and remove suspicious software.
- π Always set the automatic screen lock after 30 seconds or 1 minute of inactivity.
- π« Donβt give unlocked phones to unattended children, especially in games with multiple buttons on the screen.
- π± Avoid installing questionable βacceleratorsβ from unverified sources that may use system codes.
Remember, logging into an engineering menu is not a virus or a breakdown, it's a regular feature that just isn't meant for everyday use, and knowing simple exit methods will allow you to stay calm in any situation and quickly get your gadget back on track.
β οΈ Warning: If you notice that the sound is missing, the camera or sensor is not working, do not rush to carry the phone to the service.
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The most versatile way to exit any system menu on Xiaomi is to hold the power button for a long time until the device is fully rebooted.