Why the bottom buttons on Xiaomi phone don’t work: 7 reasons and ways to fix it

The bottom buttons on Xiaomi smartphones are a critical control that makes it difficult to use the device without. If you have no response to touch keys (Back, Home, Recent) or physical buttons (for example, on older models like Redmi 4X), the problem can be either a software failure or a hardware failure. In 80% of cases, the malfunction is fixed without visiting the service center, it is enough to correctly diagnose the source.

In this article, we'll look at all the possible causes, from the common dirt of contacts to the damage of the plume after a fall, how to check the performance of buttons through the engineering menu, what settings can block their response, and when it's time to carry the phone for repair. We will pay special attention to models with AMOLED-screens (for example, Xiaomi 12 Pro or Redmi) K50), where the sensory areas often fail due to overheating or incorrect firmware.

Before you start repairing, answer two key questions: 1. Does the screen react to touches in other areas? 2. Do buttons appear on the display when you connect the charger or headphones?

The answers will help narrow down the range of possible malfunctions.

1. Software failures: when firmware or settings are to blame

Most often, the bottom buttons stop working after updating MIUI, installing custom firmware or resetting settings. At Xiaomi, the com.android.systemui system process is responsible for processing touch zones, and its collapse can lead to buttons hanging. Check the following points:

• 🔄 Rebooting your phone. Sounds trivial, but 30 percent of the time it works. Press the power button for 10 seconds until the device shuts down, then turn it on again.
• 📱 Activation of screen buttons. MIUI There's a virtual navigation bar display function. Go to Settings. → Display. → Full screen mode → Navigation type and select "Buttons on Screen." If the physical keys don't work and virtual keys appear, the hardware problem is.
• 🛠️ Resetting launcher settings. Long-term pressing on the free desktop area → Desktop settings → Resetting. This will bring back the standard interface configuration that may have been compromised.

If the crash occurred after the update, try to roll back to the previous version of MIUI via Fastboot.

1. Download the official firmware for your model from the Xiaomi Firmware website.
2. Connect your phone to your PC in Fastboot mode (clip Volume Down + Power when the device is off).
3. Enter the command: fastboot flash all [name file firmware.zip]

⚠️ Attention: Firmware rollback erases all data from the device. Pre-backup through Settings → The phone. → Backup.

Hardware damage: plume, contacts, screen

If the software methods didn't work, the problem is the hardware.

• 🔌 Touch panel plume, 60 percent of the time it's gone after a fall or a big impact, symptoms: buttons are intermittent, only react when you press at a certain angle.
• 💧 Contact oxidation: Moisture (even condensate) leads to corrosion of the chips, often found after bathing with a phone or using in high humidity conditions.
• 🔥 CPU overheating. On Snapdragon models. 8 Gen 1/2 (for example, Xiaomi 12S Ultra: Overheating can temporarily shut down sensory areas.

For self-diagnosis:

1. Remove the back cover (on removable battery models, such as the Redmi 5A).
2. Check the integrity of the plume running from the bottom of the screen to the motherboard. It should be tightly pressed and not have tears.
3. Check the contacts for oxidation (green or white) and clean them carefully with alcohol and cotton swab when they are detected.

⚠️ Note: If you do not have experience disassembling smartphones, do not try to clean contacts or oversweeten the plume. Wrong actions can lead to complete failure of the motherboard, which will increase the cost of repairs by 3-5 times.

3. Effect of moisture and corrosion: what to do if the phone is wet

Even if your Xiaomi has IP53 protection certificate (like the Redmi Note 11), it doesn't guarantee 100% protection from moisture. Condensation, sweat, rain can all penetrate the body and cause oxidation.

• 🌧️ Divorces or spots appear on the screen.
• 🔋 The phone is quickly discharged or spontaneously shut down.
• 🎵 Speakers make wheezing, and the microphone does not catch sound well.

If you suspect your phone is wet:

1. Turn it off immediately and remove it. SIM-scatter-card.
2. Place the device in a silica gel (or rice) bag for 24 to 48 hours. Don't use a hair dryer or battery!
3. After drying, check the buttons. If the problem persists, you need a professional ultrasound cleaning of the board.

On non-removable battery models (such as the Xiaomi 13), moisture can stay under the screen for months, gradually destroying contacts. If more than 3 days have passed since wetting and the buttons do not work, you will likely need to replace the touch module.

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To check if there is moisture inside the phone, put it down on a dry napkin and leave it for 1 hour. If the napkin has wet spots, the moisture has not yet evaporated completely.

4. Damage after falling or impact

Mechanical damage is the second most common cause of broken buttons, and even if the screen was intact, the impact could damage:

• 📱 Touch controller (touch processing chip).
• 🔗 The connection between the screen and the motherboard.
• 🔋 Battery (bloating can put pressure on internal components).

Diagnosis:

1. Light a flashlight at an angle on the screen, and if you see rainbow spots or cracks under the glass, the touch layer is damaged.
2. Try connecting your phone to your PC, and if your computer can't see it, but it's charging, the problem is, USB-port that can block the operation of the lower buttons.
3. Check if the battery is swelling. Put the phone on a flat surface and spin it around. If it's playing, the battery needs to be replaced.

In the models with AMOLED-screens (e.g. Xiaomi Mi) 10T) When you hit it, it's often the touchpad, not the display, that's where you can see the image on the screen, but the touches won't be recorded. The only solution is to replace the touchpad, because it's integrated into the screen.

⚠️ Warning: If after a fall, the phone starts to warm up stronger than usual or discharge quickly, do not try to turn it on.

5 Conflict with cover or protective film

Sometimes the bottom buttons stop working because of mechanical locking with a cover or film, which is true for models with ultra-thin bezels (for example, Xiaomi 13 Lite), where the touch zones are too close to the edge.

Check it out.

• 📦 Take it off and check if the buttons are responsive. Some silicone cases have thickenings at the bottom that press down on the screen.
• 🛡️ A protective film. If it's crooked or it has bubbles in the button area, it can block the sensor. Try re-gluing the film or temporarily removing it.
• 🧲 Magnetic holders: Accessories with magnets (e.g. car mounts) may disrupt the sensor.

If the problem has disappeared after removing the case, try bending the edges at the bottom or replacing it with a model with a cutout under the touch buttons.

Remove the case and check the buttons |Remove the protective film |Check the phone without magnetic holders |Try another case (no thickening)

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6. Failures after screen replacement or repair

If the buttons stopped working after repair (e.g., a display or battery replacement), the reasons may be as follows:

• 🔧 The train is not connected properly, and the master may not have fixed the connector tightly enough or confused polarity.
• 🔄 Installed non-original screen, cheap Chinese parts often have incompatible touch controllers.
• 📱 The motherboard is damaged, and if it's not done properly, it could have been affected by the touch-processing tracks.

What to do:

1. Return to the service center and request a rediagnosis, and under the Consumer Protection Act, you have 14 days to claim.
2. If the screen was replaced by yourself, check: The density of the connection of the plume (it should click when fixing). JD9365).

In the models with OLED-screens (for example, Xiaomi 12 Pro) after replacing the display may require calibration of the sensor through the engineering menu:

1. Dial the code ##6484##.
2. Select the Touch Screen Test.
3. Follow the instructions on the screen for calibration.

The cost of repairs in official Xiaomi service centers (as of 2026):

Before the service visit:

1. Make a backup copy of the data (if the phone is still turned on).
2. Check if the center has official Xiaomi accreditation (check the list on mi.com).
3. If the phone is warranty, do not open it yourself - this will cancel the warranty obligations.

FAQ: Frequent questions about broken buttons on Xiaomi