How to clean the speaker on Xiaomi Redmi Note 4: from dust, dirt and moisture

The speaker on the Xiaomi Redmi Note 4 may eventually start wheezing, making a quiet sound, or stop working altogether. The main reasons are dust buildup, moisture or mechanical damage. If you notice the sound has become muffled or distorted, don't rush to carry the phone to the service center. In most cases, the problem can be solved on your own without resorting to expensive repairs.

This article will help you understand how to properly clean the speaker on the Redmi Note 4 depending on the type of contamination. We will consider both gentle methods (without disassembling the body) and more radical ones with partial disassembly of the device. It is important to understand that improper actions can aggravate the situation, so before starting work, carefully read all the recommendations and warnings.

If your smartphone is caught in the rain or dropped in water, cleaning the speaker should be accompanied by a complete drying of the device. Otherwise, the risk of corrosion of internal contacts increases significantly. 4/4X (codename mido) all the methods described below are relevant, but taking into account the design features - the lower speaker is combined with the microphone here, which requires special care.

Causes of pollution dynamics and signs of malfunction

Before you start cleaning, it is important to determine what exactly caused the sound deterioration. On the Xiaomi Redmi Note 4, the speaker most often suffers from:

• 🌪️ Dust and small debris – gets through the speaker grille, especially if the phone is often lying on soft surfaces (sofa, bed) or worn in a pocket without a cover.
• 💧 Moisture and condensate – even after a slight ingress of water (for example, in the rain) moisture may remain inside, which over time leads to oxidation of contacts.
• 🧴 Cosmetic products – creams, hairspray or perfume sprayed next to the phone, settle on the grille and clog the membrane.
• 🛠️ Mechanical damage – falls or bumps can shift the speaker’s membrane, leading to wheezing or complete absence of sound.

How do you know if the speaker is dirty, not broken?

• 🔊 The sound is quieter than before (at maximum volume).
• 🎵 Wheezing or distortions appear, especially at low frequencies.
• 📵 The speaker periodically "disappears" (sound, that is, no).
• 💦 After contact with water, the sound became muffled, as if from a barrel".

If the sound is completely absent, the problem may lie not in the contamination, but in the cliff of contacts or a malfunction of the sound chip. In this case, cleaning will not help - you will need a diagnosis in the service center. To check the performance of the speaker, you can use a test call or special applications, such as Phone Tester (available on Google Play).

⚠️ Note: If the Redmi Note 4 fell into water or was in a damp environment for a long time, do not turn it on immediately. SIM-card and memory card, then dry the device for 24-48 hours in a dry place (such as rice or silica gel!

Preparation for cleaning: what will be needed

Before you start cleaning the speaker, prepare the necessary tools and materials. Their choice depends on the method chosen, but the basic set looks like this:

For deep cleaning with disassembly of the phone additionally require:

• 🔧 Plastic mediator (to open the back cover).
• 🔨 Screwdriver. T4/T5 (screw-off).
• 🧲 Suction (to remove the screen, if required).
• 📱 New glue B7000 (post-disassembly).

If you've never taken a smartphone apart before, you'd better limit yourself to external cleaning without opening the case. Disassembling the Redmi Note 4 requires experience, because there are many fragile plumes inside that are easily damaged. If in doubt, contact the service.

Method 1: Cleaning the speaker without disassembling the phone

This is a method that is suitable for removing surface contaminants and dust, it is safe and does not require special skills, and the main rule is not to use sharp metal objects (needles, knives, scissors), as they can damage the protective mesh or membrane of the speaker.

Step 1: Removing large debris with a toothpick

Take a wooden or plastic toothpick (not a metal one!) and gently run the speaker around the grille, pressing slightly to push the accumulated dirt out. Move parallel to the grille, not perpendicularly, so as not to push the debris deeper.

Don’t push too hard – you can damage the membrane.

Do not use a wet toothpick.

Don't try to prick the grille through.

Do not use a toothpick if the speaker is wet.-->

Step 2: Cleaning with a brush

Take a soft brush (for example, for watercolor or makeup) and gently brush the dust off the speaker grille. Move from center to edges so you don't drive the trash inside. For better effect, you can slightly moisten the brush in isopropyl alcohol (but not in water!), and then squeeze it carefully.

Step 3: Removal of fine dust with scotch

Cut a small piece of tape (about 5 mm wide) and gently press it against the speaker grille with a sticky side down. Then sharply tear it off, along with the tape, the fine dust and villi will be removed. Repeat the procedure 2-3 times, using each time a new piece of tape.

This is especially effective if the speaker is full of pile from clothes or paper dust, and the main thing is not to overdo it so as not to leave sticky marks on the grille.

Step 4: Pulling dynamics (optional)

If you haven't recovered the sound after mechanical cleaning, you can try blowing the speaker out.

1. Turn on the phone music at maximum volume (for example, a track with deep bass).
2. Bring the phone down to the table with the speaker at a distance of 1-2 cm.
3. Carefully tap on the back of the phone next to the speaker (not the speaker itself!).

Do not use a compressor or a can of compressed air to purify, because a strong flow can damage the membrane, and don't blow with your mouth, because moisture from your breath can get in.

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If the sound is better after cleaning, but not perfect, repeat the procedure after 1-2 days. Sometimes the garbage does not come out immediately, but gradually.

Method 2: Cleaning dynamics with partial disassembly

If the external cleaning didn't work, you'd have to remove the back cover of the phone, which is a riskier method, but it allows you to get to the inside of the speaker. On the Redmi Note 4, the speaker is attached to the motherboard through a plume, so it's important not to damage the contacts when disassembling.

Step 1: Turning off and disassembling the phone

Before disassembly it is necessary:

• ⚡ Turn off the phone and remove it. SIM-memory-card.
• 🔋 Wait until the battery cools (if the phone has recently been running).
• 📱 Backup your data (in case something goes wrong).

For the removal of the back cover:

1. Heat the edge of the phone with a dryer (temperature not above 60).°C) to soften the glue.
2. Insert a plastic mediator into the gap between the lid and the case and carefully guide it around the perimeter.
3. Once the lid is gone, put it aside. Be careful, it's connected to the fingerprint scanner plume!

Step 2: Access to the Dynamics

On the Redmi Note 4, the speaker is located at the bottom of the phone.

1. Unscrew 4 screws that attach the metal plate over the battery.
2. Carefully lift the plate (do not tear it completely - it is connected to the plume).
3. Disconnect the speaker plume from the motherboard (use a plastic shoulder blade).

Now you can remove the speaker. It's usually glued to the body, so you can gently put it in the mediator.

Step 3: Cleaning the Dynamics from the Inside

For internal cleaning:

• 🧹 Remove dust from the membrane with a soft brush (do not press!).
• 💧 If there are traces of oxidation on the contacts, wipe them with a cotton swab soaked in isopropyl alcohol.
• 🔊 Check the integrity of the membrane - it should be smooth, without tears.

Do not use water, acetone or solvents for cleaning – they can damage the plastic and rubber parts of the speaker.

Step 4: Assembly of the phone

After cleaning:

1. Set the speaker in place and plug the plume.
2. Secure the metal plate and twist the screws.
3. Apply a thin layer of glue B7000 To the edges of the back cover and press it.
4. Leave your phone under a press (for example, under a book) for 1-2 hours.

⚠️ Warning: If the phone doesn't turn on after assembly or the speaker doesn't work, check if the plume is connected correctly. On Redmi Note 4, it often leaves when the assembly is sloppy. Don't force when you connect, the plume should come in easily.

Method 3: Cleaning dynamics after moisture is ingested

If the Redmi Note 4 is caught in rain or drowned in liquid, you need to act quickly. moisture left inside can cause corrosion of the speakers contacts within a few hours.

Step 1: Emergency measures

Immediately after contact with water:

• ⚡ Turn off the phone (do not press the power button – use the Power Press). + Volume Up for 10 seconds).
• 🔋 Remove the battery (if possible). On the Redmi Note 4, you need to remove the back cover.
• 📱 Get it. SIM-memory-card.

Step 2: Drying

Do not use for drying:

• 🔥 Hair dryer in hot air (can deform plastic).
• 🍚 Rice (efficiency is minimal, and dust from rice can get inside).
• 🌞 Direct sunlight (overheating is harmful to the battery).

The best way to do this is:

1. Place the phone in a sealed silica gel bag (eat in shoe or electronics boxes).
2. Leave for 24-48 hours in a dry, warm place (such as next to the battery).
3. After 12 hours, flip the phone to moisture the glass with the speaker.

Step 3: Cleaning after drying

After drying:

• Check the speaker for white plaque (a sign of corrosion).
• If there is a plaque, carefully remove it with a cotton swab dipped in isopropyl alcohol.
• Blow the speaker with cold air from the hair dryer (keep at a distance of 10 cm).

If the sound didn't recover after drying, there might have been a break in the contacts or a membrane, and you'd need to change the speaker.

Method 4: Programmatic diagnostics of dynamics

Sometimes the sound problem isn't caused by pollution, it's caused by a software failure.

Step 1: Test the dynamics through the engineering menu

On the Redmi Note 4, you can run the speaker test:

1. Open the Phone app.
2. Dial ##4636###.
3. Select Hardware Testing → Audio → Speaker Test.
4. Listen to the test sound. If it's playing clearly, the problem isn't the dynamics, it's the settings or the firmware.

Step 2: Resetting the sound settings

If the sound is distorted only in certain applications:

• Go to Settings. → Sound and vibration.
• Reset the settings to standard (Reset the sound settings option).
• Check if third-party equalizers or sound modifiers are installed (e.g, ViPER4Android).

Step 3: Flashing the phone

If the speaker is running in test mode but does not produce sound in the system:

• Make a backup copy of the data.
• Install the official firmware through the Mi Flash Tool (instructions are available on the forum) 4PDA).
• After the firmware, reset to factory settings.

On the Redmi Note 4, there are frequent audio problems after installing custom firmware (for example, LineageOS). MIUI.

Method 5: Replacement of the speaker (extreme case)

If neither method worked, the speaker is likely physically damaged and needs to be replaced. On the Redmi Note 4, this is an inexpensive procedure - a new speaker costs about 300-500 rubles, and a replacement in the service will cost 500-1000 rubles.

How to choose a speaker to replace

When buying a new speaker, pay attention to:

• 📋 Phone model – the speaker should be compatible with the Redmi Note 4 (mido).
• 🔊 Type of speaker – This model uses a speaker + microphone.
• 🛠️ Build quality – avoid cheap Chinese copies without a brand.

The best options to buy:

Self-replacement of dynamics

If you decide to replace the speaker yourself, follow the instructions:

1. Disassemble the phone (see Method 2).
2. Disconnect the old speaker plume.
3. Carefully remove the speaker from the groove (it may be glued).
4. Install a new speaker and connect the plume.
5. Put the phone back together.

⚠️ Note: When you replace the speaker with a Redmi Note 4, it is easy to damage the fingerprint scanner plume that runs nearby. If the print doesn't work after assembly, check if the plume connector has moved away from the motherboard.

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If you're not confident, you'd better trust the replacement speaker to the professionals. Installation may lead to loss of microphone or other sound problems.

Prevention: How to protect the speaker from pollution

To make the speaker on the Redmi Note 4 last longer:

• 📱 Use a case with speaker protection (for example, with protrusions at the edges).
• 🚿 Avoid moisture – do not take your phone to the bathroom or pool.
• 🧹 Regularly clean the speaker grille with a soft brush (every 1-2 months).
• 🎧 To listen to music in dusty places (construction, repair) use headphones.
• 🔋 Do not put the phone down on soft surfaces (sofa, bed).

If you are often in dusty environments (such as working on a construction site), consider buying a speaker protective film that is glued over the grille and prevents dust from entering without making the sound worse.

Also, avoid extreme temperature changes, because condensation inside your phone can damage your speaker, so if you go from frost to a warm room, don't turn your phone on right away, let it heat up to room temperature.

Frequent Questions (FAQ)