Power button on Xiaomi Redmi: 7 hidden features and solution to 5 main problems

Ever wondered why the power button on Xiaomi Redmi doesn't behave like it does on other smartphones? It seems like a simple physical switch to turn on/off the device, but in fact there are many more features hidden behind it, from hidden gestures to emergency modes. In this article, we'll look at not only the basic features of the button, but also those non-obvious chips that are not written in the official instructions.

The power buttons on Redmi (whether it’s the budget Redmi Note 12 or the flagship Redmi K60 Pro) are featured in their hardware and software integration with MIUI. For example, a long press can not only turn off the phone, but also activate the voice assistant Xiao AI — but only if this feature is enabled in the settings. And in some models, the button even works as a fingerprint scanner, although it is not visible on the outside.

But what if the button stopped responding? Or the phone turns on itself? We've compiled all the possible scenarios, from the mud under the key to serious hardware breakdowns, and we've explained in detail how to diagnose the problem. And you'll also learn how to use the power button to covertly reset your settings if your phone is locked.

1. Basic functions of the power button: what it knows "out of the box"

At first glance, the power button on Xiaomi Redmi performs the same tasks as on any other Android smartphone:

• 🔄 Short press – lock/unlock the screen (unless you use a fingerprint sensor or Face) ID).
• 🖥️ Long pressing (3-5 sec) - call the switch-off / restart / emergency mode menu.
• 📱 Double tap (on some models) – quick start of the camera or other application.

But even in base mode, there are nuances. For example, on the Redmi Note 11 and later, a long press may not immediately open the turn off menu if the Xiao AI voice assistant is activated in the settings. Instead, the phone will wait for a voice command. To return the standard behavior, you need to:

1. Go to Settings → Special Opportunities → Power button.
2. Disable the option to start the voice assistant.

Another little-known feature is emergency calling, which, if you press the power button 5 times in a row (with intervals of ~1 sec), the phone automatically calls the emergency number (112 in Russia), which works even on a locked screen and can save lives in a critical situation.

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In the models with IR-With a blaster (e.g. Redmi Note 10), the power button can be programmed to control the equipment via the remote. To do this, install the Mi Remote app and adjust gestures in the Settings section. → Connected devices.

2. Hidden possibilities: what the button does, what you didn't know

The manufacturer doesn't advertise all the functions of the power button, but some of them can make it much easier to use a smartphone.

The "Double Press to Start" feature is particularly interesting. In settings → Settings → Display → Double tap to wake up, you can double tap the power button to start any application — for example, a flashlight or a camera — which is convenient when you need to quickly take a picture without unlocking the phone.

And here's the secret mode: if you hold the power + volume button on your phone for 10 seconds, Fastboot, the firmware and recovery mode, is activated, and this is the only way to reanimate the phone if it doesn't turn on because of corrupted software.

3. Power button as a fingerprint scanner: pros and cons

Starting with the Redmi K40 and Note 11 Pro+, Xiaomi has integrated the fingerprint sensor directly into the power button.

• ✅ Convenience – no need to reach for the back panel or screen.
• ✅ Speed – Unlocking happens for 0.2-0.3 seconds.
• ❌ Wear of the button – frequent pressing can lead to mechanical damage.
• ❌ False positives – if your finger is wet or dirty, the sensor may not work.

If the scanner is no longer able to recognize the fingerprint, try:

1. Reboot the phone.
2. Remove and re-add fingerprint to Settings → Passwords and security → Fingerprints.
3. Rub the button with an alcohol napkin (no fanaticism!).

On some models (e.g. Redmi K50 Gaming), the power button has a backlight that flashes when notified, which can be turned off in the LED light settings.

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If the fingerprint sensor in the power button stopped working after the phone fell, the plume is likely damaged, in which case only changing the button in the service center will help.

4.Typical Power Button Problems and Their Solutions

The power button is one of the most vulnerable parts of a smartphone, and here are 5 of the most common problems and ways to fix them:

If the button is completely unresponsive, but the phone turns on when you connect to the charger, the problem is precisely hardware.

Check if the button is responsive to pressing when the phone is off (should vibrate)

Connect your phone to your PC – whether it’s detected in Fastboot mode (power button + volume up)

Try to start the phone without a power button (via the phone) ADB-adb reboot)

Check the button for physical damage (cracks, backlash)

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For a temporary solution (if the button is broken, but the phone needs to be turned on) you can use it. USB-You plug the phone into the computer and execute the command:

adb shell input keyevent 26

This simulates the pressing of the power button, but for this to happen, you have to have USB debugging enabled in the developer settings.

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If the phone doesn't respond to either the power button or the charge, try holding it on a charge for 10-15 minutes. Sometimes the battery runs so low that the power controller blocks the power on.

5. How to use the power button to reset settings

If your phone is locked and you've forgotten your pattern lock or password, the power button can be your lifesaver, and you can use it to start Recovery and reset to factory settings. Here's a step-by-step guide:

1. Turn off the phone (if it is on, hold the power button 10-15 seconds).
2. Press the power button + increase volume and hold 5-10 seconds until the Mi logo appears.
3. In the Recovery menu, select Wipe Data → Wipe All Data (manage by volume buttons, confirm by power button).
4. After resetting, restart your phone (Reboot → Reboot to System).

⚠️ Warning: Recovery removes all data, including photos, contacts and apps. If your phone has a Mi Account enabled, you will need to enter your username and password to unlock after the reset (Mi Cloud Lock protection).

Some models (e.g. Redmi 9A) have a touch-controlled MIUI Recovery instead of the standard Recovery.

• Select the language (stamp the flag).
• Press Wipe Data → Confirm.
• After completion, tap Reboot.

If the phone doesn't boot even to Recovery, the last option is to run through Fastboot using the Mi Flash Tool. USB-cable.

6. Software glitches: when it's not the button that's to blame, but MIUI

Sometimes the power button doesn't behave as if it's a hardware problem, but because it's a firmware failure.

• 🔄 The phone spontaneously reboots when you press the button.
• 🛑 The shutdown menu does not open or opens with a delay.
• 📵 The button is working, but the fingerprint scanner is not responding.

In such cases, it will help:

1. Clean the system cache: Go to Settings → About Phone → MIUI Version. Tap 7 times to activate Developer Mode. Go back to Settings → Additional → Developer → Cache Cleanup.
2. Reset MIUI settings (without data loss): Settings → System and device → Additional → Reset settings → Reset MIUI settings
3. Update rollback (if the problem appeared after the update): Settings → About the phone → System update → Three points (menu) → Update rollback

⚠️ Note: If after the update MIUI The power button stopped working as a fingerprint scanner, check if the security settings have reset, and sometimes the system requires you to re-add the fingerprints after major updates.

On Android 12+ models (like the Redmi Note 12 Pro+), Safe Mode can help.

1. Hold the power button until the off menu appears.
2. Press the option to turn off with your finger - a suggestion will appear to go to safe mode.
3. Confirm and restart the phone.

In safe mode, all third-party applications are turned off, and if the button works normally, the problem is in one of the installed software.

7 Mechanical breakdowns: when you can not do without repairs

If all the software methods have been tried and the power button still doesn't work, it's a hardware malfunction.

• 🔧 The button falls or luftitis (visible to the naked eye).
• 💧 The phone fell into the water or was exposed to severe humidity.
• ⚡ After the button drops, it stops pressing or works again.
• 🔋 The phone does not turn on at all, even when connected to charging.

Depending on the model, replacing the power button costs 1,500-4000 rubles (including work). On the Redmi Note series is cheaper, on the flagships (Redmi K60) - more expensive because of the complexity of disassembly. If you decide to replace the button yourself, consider:

• 🛠️ You will need a special screwdriver (usually). T3 or T5).
• 🔥 Risk of damaging the display plume or battery during disassembly.
• 📱 On models with built-in fingerprint scanner in the button, you need to reconfigure the sensor after replacing it.

For Redmi 10C, 9A and other budget models, you can find a power button on AliExpress for 200-500 rubles. For flagships, it is better to take original spare parts - non-original ones may not work correctly with the fingerprint scanner.

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If the power button is replaced, check the connection of the plume to the motherboard. Often the contacts oxidize or depart during disassembly.

FAQ: Frequent questions about the power button on Xiaomi Redmi