How to turn off headphone mode on Xiaomi Redmi 9: if the sound goes only to headphones

Why Xiaomi Redmi 9 is “stuck” in headphone mode and how to fix it

Did you plug your headphones into the Xiaomi Redmi 9, and the sound still goes through them, even after you shut it off? Or did the phone stop playing sound through the speakers altogether, "thinking" that the headphones are still connected? This problem is familiar to many Xiaomi smartphone owners - especially after MIUI upgrades or mechanical damage to the 3.5mm connector.

The reasons for this behavior can be different from the banal contamination of the headphone jack to software failures in the system. 80% of the time the problem is solved without visiting the service center - just perform a few simple actions. In this article, we will discuss 5 working ways to return sound to the Redmi 9 speakers if it is "stuck" in headphone mode.

Before you go to drastic measures (like resetting), try mechanical methods — they often help even in severe crashes. And if your smartphone gets caught in the rain or falls in the water, first read the important information about drying.

Method 1: Cleaning the headphone jack is the first step to solving

The most common reason for “sticking” headphones is contamination or oxidation of contacts in the socket 3.5 mm. Dust, pile from the pocket or moisture residue can create false contact, which makes the phone “think” that the headphones are connected.

To clean the connector:

• 🔦 Take a flashlight and inspect the nest - there should be no foreign objects inside (for example, the fragments of a plug).
• 🧴 Soak the cotton swab in alcohol (90%+) or contact cleaning fluid (e.g., Kontakt 60).
• 🌀 Carefully swipe the stick inside the connector to remove the oxides. Don't push hard, you can damage the contacts!
• 💨 Let the connector dry for 10-15 minutes (you can speed up the process with a dryer in cold mode).

If the sound didn't recover after cleaning, try inserting and removing the headphones 5-10 times -- sometimes it resets the false alarm. Doesn't help? Move on to the next method.

Method 2: Software reset via engineering menu (codes #)

If mechanical cleaning didn’t work, the problem could be a software failure of the audio system. Xiaomi Redmi 9 has a hidden engineering menu through which you can force reset the audio settings.

Follow the following steps:

1. Open the Phone app and type the combination: ##36446337## (this is a code for audio testing on MIUI).
2. In the menu that opens, select Headset Mode (or Headphone Mode).
3. Press Disable, then save the changes.
4. Restart the phone and the sound should return to the speakers.

If the code doesn’t work, try an alternative:

##4636##

→ Go to the Audio tab. → Headphones → Shut down.

Enter code ##36446337###| Disable Headset Mode|Reboot phone | Check audio through speakers

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⚠️ Note: Not all engineering menu codes work on custom firmware or after updates MIUI. If nothing happens after entering the code, proceed to the next method.

Method 3: Resetting sound settings through system settings

Sometimes the headphone mode gets stuck due to a conflict of sound settings, in which case the reset of audio parameters to the factory will help:

Instructions:

1. Open the Settings. → Sound and vibration.
2. Scroll down and click on the Additional Settings.
3. Select Reset the sound settings (or Reset the default settings).
4. Confirm the action and restart the phone.

If there is no such item, try an alternative path: Settings → Annexes → Application management → Three points (⋮) → Resetting application settings.

Then check the sound.

💡

Before resetting your sound settings, write down the current volume levels for alarms, media, and notifications – they will reset after reset.

Method 4: Forced reboot and check for “hang” drivers

If Redmi 9 suddenly went deaf and stopped playing sound through speakers, it's possible that the audio driver got stuck.

• 🔄 Updates MIUI (particularly by air»).
• 📱 Installation of applications that work with sound (for example, ViPER4Android or equalizer).
• 🔋 Sudden power outage (battery discharge to 0%).

To "wake up" the audio driver:

1. Press the Power + Volume button for 10-15 seconds until the phone restarts.
2. If the sound does not appear, plug the headphones, turn on the music, then turn them off during playback.
3. Try connecting Bluetooth headphones and turning them off – sometimes it resets the mode.

⚠️ Warning: If the phone is forced to restart and it is com.android.phone or audio.hal, it is a sign of a serious failure, and only a complete reset will help.

Method 5: Hardware malfunctions - when you can not do without repair

If none of the software methods worked, the problem is likely hardware. Here are the most common malfunctions Xiaomi Redmi 9, leading to "sticking" the headphone mode:

• 💧 Moisture entering the connector or the motherboard (even if the phone did not sink, condensation from a sharp temperature drop can cause corrosion).
• 🔌 Damage to contacts in the socket 3.5 mm (for example, after sloppy connection of headphones).
• 🔧 Audio chip dump (a common problem after falls or overheating).
• 🔋 Failure of the plume connecting the connector to the motherboard.

How to diagnose a hardware problem:

1. Connect the headphones knowingly - if the sound is only in one ear or with interference, the problem is the connector.
2. Try playing the sound via Bluetooth – if it’s clean, a malfunction in the phone’s audio track.
3. Check if the phone is responding to the connection/disconnection of the headphones (the icon should appear in the status bar).

If the phone is in contact with water:

• ❌ Do not dry it with a hair dryer on hot mode - this will accelerate corrosion.
• ✅ Place the device in rice or silica gel for 24 to 48 hours.
• ⚠️ Do not turn on the phone until it is completely dry (at least a day).

Cost of repair in the service center:

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If the phone falls or gets wet, do not try to repair the connector yourself - without experience it is easy to damage the contacts on the motherboard.

Extreme measures: reset to factory settings

If all previous methods failed, you will have to reset your phone completely, so you will first:

• 📱 Backup important files (photos, contacts, messages).
• 🔐 Remember or write down account passwords (especially Mi Accounts).
• 📋 Make sure you have access to the email tied to the phone (required to unlock after resetting).

Resetting instructions:

1. Open Settings → About the phone → Reset settings.
2. Select Delete all data (reset to factory data).
3. Enter your password (if requested) and confirm the action.
4. After the reboot, set the phone as new and check the sound.

If the phone doesn’t respond to touch or is locked, reset via Recovery mode:

1. Turn off Redmi 9.
2. Press Power + Volume Up until the Mi logo appears.
3. From the Recovery menu, select Wipe Data → Wipe All Data (manage volume and power buttons).
4. Confirm the action and wait for the completion.

⚠️ Note: On some versions MIUI After the reset, you may need to enter data from the Mi Account tied to the phone. If you don't remember the password, unlocking it will take up to 72 hours!

FAQ: Frequent questions about the headphone mode on Xiaomi Redmi 9