When a smartphone enters the so-called Factory Mode (or Factory Test Mode) often causes panic among users. The screen locks, the sensor stops responding, and the device seems hopelessly broken. However, in most cases, this is not a fatal error, but a specific state of the system, intended for factory diagnostics.
This state is activated accidentally, usually due to a combination of pressed buttons when turning on or a malfunction of system processes. Android goes into hardware testing mode, ignoring the standard loading of the interface. Understanding the nature of this mode is the first step to successfully solving the problem.
In this article we will analyze all the known ways to exit this state, from simple reboots to using the engineering menu. You will find out why this happens and how to bring your smartphone to life without contacting a service center.
What is Factory Mode and why does the phone get into it?
Factory Mode is a hidden section of the firmware used by engineers at the factory to check the functionality of all components of the device before sale. In this mode, you can test the screen, speakers, microphone, sensors and radio modules.
The average user should not see this menu. Getting into it often happens due to a stuck physical button Volume+ or Volume - when the phone is turned on. Also, the reason may be incorrect system update or interference with system files through ADB.
Sometimes the mode is activated by malware that tries to gain deep access to the system. If you notice that the phone itself reboots into this menu, it is worth checking the device for viruses after a successful exit.
⚠️ Attention: Being in Factory Mode does not erase your data automatically, but incorrect actions within this menu (for example, formatting memory) can lead to complete loss of information.
Different manufacturers call this mode differently. On devices Samsung this can be Test Mode, on Xiaomi — CIT, and on pure Android it’s just an engineering menu. The principle of their operation is similar, but the exit paths may differ.
If the phone vibrates or makes sounds when you press buttons in this mode, it means that the sensors and tactile feedback are working properly, and the problem is purely software.
Basic methods of rebooting the device
The simplest and most effective way out is forced reboot. In 80% of cases, this resets the temporary boot flag that keeps the phone in test mode.
To do this, you need to hold down the power button. On modern models, holding the button Power for 10-15 seconds brings up the shutdown menu or (Force Restart). If the menu does not appear, simply hold the button until the screen goes dark and the manufacturer's logo appears.
If pressing a single button does not help, try a combination of buttons. For many devices Samsung and Google Pixel the combination Volume - + Powerworks. Hold them simultaneously for about 7-10 seconds.
- 🔄 Press the button
Powerfor 15 seconds until the device vibrates completely. - 🔘 Try the combination
Volume -andPowerat the same time. - 🔋 Disconnect the charger, if it is connected, and try rebooting again.
- 📱 If the battery is removable, remove it for 30 seconds and insert it back.
It is important not to release the buttons too early. The controller level power reset process may take longer than a normal interface reset. Wait until the image on the screen completely disappears.
☑️ Soft reboot algorithm
Exit through the engineering menu and USSD codes
Sometimes the phone boots into a mode where there is access to dialing or hidden settings. If you see a field for entering numbers or a menu with items, you can try using special exit codes.
Try entering the standard exit code from test mode: #0# or ##4636##. These combinations often redirect the system to another diagnostic menu, from where you can reboot or disable test mode.
On some devices MediaTek entering a code *#3646633#helps. After entering, the engineering menu will open, where in the section Common -> Reboot you can select the item Normal Boot.
| Manufacturer | Access code | Action | Risk |
|---|---|---|---|
| Samsung | #0# |
Menu tests | Low |
| Xiaomi / Redmi | ##6484## |
CIT Menu | Low |
| MediaTek (general) | *#3646633# |
Engineer Mode | Average |
| Huawei | ##2846579## |
Project Menu | Average |
Be extremely careful when changing settings in the engineering menu. Do not change parameters whose meaning you do not know, especially in sections related to radio frequencies or screen calibration.
⚠️ Attention: Changing parameters in the engineering menu may lead to loss of communication (IMEI) or incorrect operation of the display. Change only the settings related to reboot.
What to do if the code is not entered?
If the input field is inactive, try connecting a USB keyboard via an OTG adapter. This will allow you to enter a command even if the sensor is not working.
Using Recovery Mode to reset the state
If a standard reboot does not help, you must use Recovery Mode. This is an emergency recovery mode that boots separately from the main system.
To get there, turn off the phone (if it is frozen, hold Power until it turns off). Then hold down the combination Volume+ and Power (on some models Volume- + Power). Hold the buttons until the logo or menu with the robot appears.
In the Recovery menu, navigation is carried out with the volume buttons, and selection is done with the power button. You don't need to do a full reset (Wipe Data). Find the item Reboot system now and select it. This will force the phone to restart in normal mode.
If the phone returns to Factory Mode again after this reboot, the file bootloader or system partition may be damaged. In this case, you may need to flash the device via a computer.
Using the "Reboot system now" item in Recovery Mode is safe for data and often helps to exit the cyclic boot into test mode.
Advanced methods: ADB and Fastboot
For users familiar with USB debugging, the most powerful tool is ADB (Android Debug Bridge). This method allows you to send a reboot command directly to the system kernel, bypassing physical buttons.
You will need a computer with ADB drivers installed and a USB cable. Connect your phone to your PC. If USB debugging is active in Factory Mode (which is rare, but possible), you will be able to send a command.
adb rebootIf the regular command does not work, you can try rebooting into bootloader mode, and from there into the system:
adb reboot bootloaderAfter getting into Fastboot mode (bootloader mode), select the item using the volume buttons Start or Normal Boot and confirm with the power button. This often resets the test mode flag.
- 💻 Install Platform-Tools on your computer.
- 🔌 Connect the device and test the command
adb devices. - ⌨️ Enter the command
adb rebootfor soft reboot. - 🛠 Use
fastboot continueif the phone is stuck in Fastboot.
This method requires drivers. If the computer does not see the device, try other USB ports or cable. Without the debugging mode installed, this method may not work.
Radical measures: Hard Reset and flashing
If none of the soft methods helped, the option of a complete reset remains. This will delete all user data, but is guaranteed to clear system errors that are causing the loop.
Enter Recovery Mode (as described in the section above). Select item Wipe data/factory reset. Confirm the action. After completion, select Reboot system now.
In the most difficult cases, for example, if the system partition is damaged system, a complete flashing will be required using the manufacturer's tools: Odin for Samsung, SP Flash Tool for MediaTek or Mi Flash for Xiaomi.
⚠️ Attention: Hard Reset permanently deletes photos, contacts and applications. You should only resort to this method if the data is already synchronized with the cloud or saving it is impossible.
When flashing, make sure that the software version matches your model. Incorrect firmware can turn your phone into a brick. Download images only from the official websites of manufacturers.
Prevention and frequently asked questions
To avoid a repetition of the situation, check the serviceability of the volume buttons. Often the problem lies in a protective case that puts too much pressure on the keys, or in moisture getting inside the case.
Do not install applications that require suspicious permissions or superuser rights from unverified sources. They can intentionally put the device into debugging or testing mode.
Why does the phone turn on itself in Factory Mode?
Most often this is due to a hardware problem: the volume button is stuck due to dirt, impact or manufacturing defects. Less commonly, the reason is a software failure during the update.
Will my photos be deleted when exiting the mode?
During a normal reboot or exit through the engineering menu, the data is saved. They are deleted only when the command is executed Wipe data (Hard Reset).
Is it possible to exit the mode without a computer?
Yes, in most cases, a combination of the power and volume buttons is enough to force a reboot or enter Recovery Mode.
What to do if the buttons do not respond?
Try connecting charger. Sometimes connecting power will initiate a reboot. If it doesn’t help, leave the phone to discharge until it turns off completely, then charge it and turn it on.