Receiver in the smartphone Xiaomi: appointment, malfunctions and ways to check

Have you ever wondered why when you call, it's not from the speaker on the back, it's like it's from the inside of the phone? Or why when you listen to voice messages in messengers, the sound is not coming from the main speaker, but from somewhere on top? All this works thanks to the receiver, a small but critical component in Xiaomi smartphones. Many users confuse it with the main speaker or microphone, but in fact it is a separate module with unique features.

In this article, we will discuss in detail what the receiver is in Xiaomi phones, how it works, what problems can arise with it and how to solve them. You will learn why it is impossible to communicate comfortably on the phone without this element, how to distinguish a receiver malfunction from a speaker breakage, and what to do if the sound during calls becomes quiet or disappears, and also how to check the performance of the receiver yourself without contacting the service center.

If you have a problem with the sound in the Redmi Note 12, POCO X5 Or any other Xiaomi model, this article will help you figure out whether the receiver is to blame for this, and what to do!

What is a receiver in a smartphone and why you need it

The term receiver, in the context of smartphones, refers to a conversational speaker, a small audio module that is responsible for playing sound during phone calls. Unlike the main speaker (which is used for music, video and games), the receiver:

• 📞 Specialized only for voice communication – its frequency range is optimized for human speech (300-3400 Hz).
• 🔊 Located at the top of the phone, next to the front camera (sometimes under the display in frameless models).
• 🔋 It consumes minimal energy, as it is not designed for loud sound.
• 🛡️ Protected from dust and moisture (in certified models) IP53 higher).

Xiaomi smartphones often integrate the receiver into one module with a proximity sensor and an LED indicator (if any). For example, the Xiaomi 13 Pro uses a piezoelectric receiver that vibrates not due to a traditional membrane, but thanks to a piezoceramic element, which makes the module thinner and more reliable.

Why can't you use the main speaker for calls? It's all about acoustic design: the main speaker is designed for a wide range of frequencies and high volume, but when you talk, it creates echoes and distortions, and the receiver transmits sound directly to the ear, minimizing extraneous noise.

How to distinguish receiver from main speaker and microphone

Many users confuse the receiver with other audio components of the smartphone. To avoid mistakes, remember the key differences:

Some of the Xiaomi models (for example, POCO F5 or Redmi K60) The receiver can be hidden under the display, in which case its location only gives a small perforation or grid at the top of the screen, to accurately identify the receiver:

1. Open the Phone app and dial ##6484## (test code to check audio in some Xiaomi models).
2. Select the Receiver Test option – if the sound comes from above, it’s him.
3. Try to turn on the hands-free mode during the call - if the sound switches to the bottom speaker, then the receiver is working.

⚠️ Warning: Don't confuse the receiver with the vibrator! The latter is responsible for the tactile recoil (vibration), not the sound. If the phone vibrates when you call, but there is no sound, the problem is the receiver or software settings.

Causes of malfunctions receiver in Xiaomi: from dust to firmware

If you stop hearing the other person during the call (or the sound becomes quiet, distorted), the receiver may be to blame.

• 🧹 Dust or moisture pollution — over time, the receiver grid gets clogged, which makes the sound worse. IP.
• 💥 Mechanical damage – a phone drop face down can damage the piezoelectric element or contacts.
• 🔌 Contact oxidation – if the phone has been exposed to moisture (even without being completely submerged).
• 🤖 Firmware failures - after the update MIUI Audio settings can fly (for example, in Xiaomi). 12T There was a problem with the receiver drivers after the update to MIUI 14).
• 🔊 Wearing of the membrane - in cheap models (for example, Redmi) 9A) The receiver can degrade after 2-3 years of intensive use.

How do you know if the problem is with the receiver, not the microphone or the speaker?

• 📵 The sound is there, but it is very quiet (you have to press the phone to your ear).
• 🔇 In the hands-free mode everything works fine.
• 🎵 Music and video playback through the bottom speaker without any problems.
• 📞 The interviewee hears you well, but you don’t.

In 30 percent of cases, the problem is software-based, for example, after resetting the settings to POCO X3 Pro can get lost in routing sound, and the receiver is no longer used:

1. Phone reboot.
2. Resetting sound settings in Settings → Sound and vibration → Resetting settings.
3. Update MIUI to the latest version.

⚠️ Warning: If the receiver starts wheezing or making extraneous noises, do not blow into it - this can drive the dust deeper and damage the membrane).

How to repair receiver in Xiaomi: step-by-step instructions

If you're sure the receiver is the problem, you can try to restore it without going to the service.

1. Software Methods (free of charge)

First, rule out software failures:

1. Restart your phone in Safe Mode (click the power button) → long tap on "Switch off» → «Safe Mode. If the sound appears, it's the third-party app's fault.
2. Check the call settings: Settings → SIM-maps and mobile networks → Call settings → Audio-routing Make sure you select Dynamic (not Loud Communication or Bluetooth»).
3. Reset network settings: Settings → SIM-maps and mobile networks → Resetting network settings

2. Mechanical cleaning (caution!)

If the receiver is contaminated:

1. Take a soft toothbrush (or makeup brush) and gently clean the receiver's net.
2. Use compressed air (a canister for cleaning equipment) - with short pulses, without bringing the nozzle closer to 2 cm.
3. Isopropyl alcohol can be used for persistent contaminants (70%+) and a cotton swab, but don't pour the liquid inside!

What can't be done:

• ❌ Blow the receiver with your mouth - saliva and moisture will aggravate the problem.
• ❌ Use needles or toothpicks - you can tear the membrane.
• ❌ Heating the phone with a hair dryer will damage the glue holding the receiver.

Replacement of the receiver (for advanced)

If the receiver is completely out of order, it can be replaced yourself (if you have tools). For Xiaomi, the original modules from AliExpress or eBay will suit (see the phone model). + «Receiver) Cost: 200 to 800 rubles.

Tools:

• 🔧 Plastic mediator or suction cup for removing the back cover.
• 🔨 Screwdriver. T3 or T5 (model-wise).
• 🧲 Tweezers and magnetic screw mat.
• 🔥 Hair dryer or glue heating station (if the cover is glued).

Step-by-step:

1. Turn off the phone and remove it. SIM-map.
2. Heat the back cover with a hairdryer (if it is glued) and gently tuck the mediator.
3. Unscrew all the screws holding the metal plate over the battery.
4. Disconnect the receiver plume (usually connected to the motherboard next to the charging connector).
5. Carefully remove the old receiver and install the new one by fixing it on a double-sided tape.

⚠️ Note: In Xiaomi models with piezoelectric receiver (for example, Xiaomi 13 or Mix 4), the replacement requires special care - the piezoelectric element is fragile and can crack if handled carelessly.

Xiaomi models with frequent receiver problems: top-5 «patient»

Some Xiaomi smartphones are more prone to receiver malfunctions due to design features or component savings.

If you have one of these models, it is recommended that:

• 🛡️ Use a cover with upper protection (to prevent dust from entering).
• 🔄 Update regularly MIUI (In new versions, audio bugs are often corrected).
• 💧 Avoid using your phone in wet conditions (such as in the bathroom).

Owners. POCO X3 Redmi Note 8 should be especially closely monitored the status of the receiver – these models are the leader in the number of calls to service centers with this problem.

💡

If your Xiaomi is in the rain and the receiver stops working, don't turn on the phone right away. SIM-leave the card in a dry place (such as a silica gel bag) for 24 hours, and in 60% of cases this helps to avoid replacement.

What to do if the receiver in Xiaomi does not work after the update MIUI

One of the most common causes of a receiver malfunction is a failure after a firmware update. MIUI Audio drivers sometimes change, and the old settings conflict with them:

• 🔄 After updating to MIUI 14 receiver stopped playing sound, but speakerphone is working.
• 📵 The sound in the receiver became robotic or delayed.
• 🔇 In the sound settings missing the option “Dynamic” for calls.

Here's the algorithm for action:

1. Update rollback (if the problem appears immediately after the update): Settings → The phone. → Updating the system → ⋮ → Remove the latest update Note: This option is only available for 10 days after the update.
2. Resetting sound settings: Settings → Sound and vibration → ⋮ → Resetting settings
3. Cleaning the cache of the “Phone” application: Settings → Annexes → Application management → Phone. → Warehouse → Clear the cache
4. Manual installation of the old version MIUI (For advanced: Download the desired firmware version from the official Xiaomi website. Go to Settings → The phone. → Version. MIUI And tap 7 times on the logo. MIUI, to unlock Developer Mode. Go back to Settings → Additionally. → For developers" and enable "Unlocking OEM» and “Debugging by USB». Connect your phone to your PC, launch the Mi Flash Tool and run the old version.

If neither method worked, the problem could be hardware incompatibility. for example, in Xiaomi 12 Lite after upgrading to the new model. MIUI 14.0.4 Some users have experienced a problem with the receiver being stopped due to a conflict with the new version of the audio codec, in which case you just have to wait for a patch from Xiaomi or contact the service to flash through the new audio codec. EDL-regime.

💡

Before the update MIUI Always back up your audio settings through Settings → Additionally. → Backup and reset, which will help to quickly restore the receiver to work if something goes wrong.

When to contact the service: signs of serious breakdowns

Not all problems with the receiver can be solved on their own, but here are the signals that it is time to carry the phone for repair:

• 🔧 The receiver is not fully operational, although software methods did not help.
• 🔥 After falling or getting moisture, the sound is distorted or interrupted.
• 🔌 Phone does not detect receiver in test menu (code ##6484## gives an error).
• 💥 The receiver cracks or whistles even after cleaning.
• 🔄 The problem appears periodically (i.e., then not), which indicates poor contact on the board.

The cost of repairing the receiver in service centers:

• 💰 Diagnosis - 300-500 rubles.
• 🔧 Replacement of the receiver - 800-2000 rubles (depending on the model).
• 🔥 Repair after moisture is ingested – 1500-3500 rubles (includes board cleaning).

Where to repair it:

• 🏢 Xiaomi service centers – 6 months warranty, but more expensive.
• 🛠️ Unofficial workshops are cheaper, but the risk of poor-quality replacement.
• 📦 Self-substitution only if you have the experience and tools.

Before the service visit:

1. Make a backup copy of the data (in case of resetting).
2. Write down the phone model and version MIUI (is in the settings → The phone).
3. Check if the warranty is valid (if the phone is under 12 months old).

⚠️ Warning: If you're offered a "resilver resilver" instead of a replacement, don't. 90% of the time, it's a temporary solution, and after a month, the problem will come back.

FAQ: Frequent questions about receiver in Xiaomi