Wireless headphones have become an integral part of everyday life – they are convenient for listening to music, podcasts or calls without confusing wires. Owners of Xiaomi Redmi 9C NFC often face questions: how to properly sync a device with new Bluetooth headphones, why the phone does not see the headset or how to fix interruptions. This article will help you understand all the nuances from basic connection to solving rare problems.
The Redmi 9C NFC features a Bluetooth 5.0 module that provides stable connectivity to most modern headphones: Xiaomi AirDots, Sony WH-1000XM4, Apple AirPods or JBL Free. However, even with support for the latest protocols, users sometimes face difficulties — especially if the headset has previously been paired with another device or requires a special pairing mode. We will discuss each step in detail, including hidden phone settings that can affect the quality of communication.
Preparation of headphones and phone to connect
Before you start pairing, make sure both devices are ready to connect. Let's start with wireless headphones:
- 🔋 Charging: The level of the headphone battery should be at least 30%. A discharged headset may interrupt the connection process or fail to enter search mode. 10-15 minutes if the indicator shows a low charge.
- 🔄 Resetting: If the headphones have previously been paired with another phone, do a reset.For most models, this is done by holding the power button for a period of time 10-15 Seconds (until the indicator flashes in red/white). For AirDots Pro, triple tap on the touchpad.
- 🎧 Pair mode: Activate it according to the manufacturer's instructions, usually holding the power button or a special key until the beep or flashing in blue/white.
Now prepare Xiaomi Redmi 9C NFC:
- 📱 Update: An outdated version MIUI Could cause problems with Bluetooth. Check firmware relevance in Settings → The phone. → Updating the system.
- 🔍 Cache Clearing: Go to Settings → Annexes → Application management → System applications → Bluetooth, then press Clear cache. This will delete the temporary data that may interfere with the connection.
- 🛠️ Verification of the module NFC: Thought NFC It doesn't directly affect Bluetooth, and some users have reported conflicts while activating both modules simultaneously. NFC in quick settings for connection time.
⚠️ Note: If you use headphones with support LDAC or aptX (e.g. Sony) WH-1000XM3), Make sure that the phone settings have the appropriate audio codec enabled. To do this, after connecting, go to Settings. → Connected devices → Headphone settings → Sound quality.
Step-by-step instructions for connecting Bluetooth headphones
Follow this algorithm to sync the headset with the Redmi 9C NFC:
- Activate the pairing mode on the headphones (see section above). Usually, a flashing blue/white indicator or voice alert signals a successful activation.
- On your phone, open Settings → Connection and Sharing → Bluetooth and turn on the switch.
- In the list of available devices, find the name of your headphones (for example, “Mi True Wireless Earphones” or “Galaxy Buds+”) and tap it.
- Confirm pairing if a request appears. Some models (such as AirPods) may require additional confirmation on a second device (such as an iPhone).
- Wait for the "Connected" message, the headphones on the list, and they're ready to go.
Headphones are displayed in the list of connected devices
The indicator on the headset is lit with even light (does not flash)
The sound is played through headphones, not the phone speaker
In the status bar, the Bluetooth icon is displayed.-->
If the headphones don’t appear on the list, try the following:
- 🔄 Reboot Bluetooth Module: Disconnect and Re-enable Bluetooth on your phone.
- 📱 Reboot your phone: Sometimes system processes block device detection.
- 🎧 Check compatibility: Make sure the headphones support Bluetooth 4.0 or higher (Redmi) 9C NFC It does not work with older versions of Bluetooth 2.1).
Xiaomi AirDots (any model)
Apple AirPods
Sony WH/WF-series
JBL or other brands
I don't know the model.-->
Customization of sound and microphone after connection
After successful pairing, it is recommended to optimize the sound parameters for better quality:
| Parameter | Wherever | Recommended value |
|---|---|---|
| Sound quality | Settings → Connected devices → [Hearphone Name] → Sound quality | High (AAC/aptX) for music, Balanced for calls |
| Noise suppression | Settings → Sound → Sound Effects → Noise Suppression | On (if the headphones support ANC) |
| Microphone | Settings → Connected devices → [Hearphone Name] → Use for calls | On (if you plan to call through the headset) |
| Absolute volume. | Settings → System → Developer → Turn off absolute volume | Disconnected (for smooth volume control) |
For active noise reduction (ANC) models, additionally:
- 🎛️ Set the level. ANC in the manufacturer’s application (for example, Sony Headphones Connect or JBL Headphones).
- 🔇 In noisy places (metro, plane) turn on the "Transparency" mode to hear the surrounding sounds.
⚠️ Warning: If the sound is interrupted or interference is heard after connecting, check Settings → Battery and productivity → Battery mode: Activating Charge Savings mode may limit Bluetooth module performance.
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If the headphones support multipoint (simultaneously connecting to two devices), pair them with a Redmi 9C NFC first, and then with a second phone or laptop. Order matters!
Solving common connection problems
Even after successful pairing, Redmi 9C NFC users may experience typical problems.
1.The phone doesn't see the headphones
Possible causes and solutions:
- 🔌 Headphones are not in pairing mode: Repeat activation of search mode (see model instruction).
- 📵 Bluetooth phone module locked: Go to Settings → Annexes → All applications → Bluetooth and check the permissions.
- 🔄 Conflict with other devices: Disable all other Bluetooth headsets in settings.
2.The sound is interrupted or interference is occurring.
This may be related to:
- 📶 Interference from other devices: Turn off Wi-Fi or go to 5 GHz (if the router is dual-band).
- 🔋 Low-charge headphones: Charge the headset to 50% or more.
- 🎵 Non-optimal codec: In the headphone settings, select AAC instead SBC.
3.The microphone is not working during calls
Check it out.
- 🎤 Microphone settings: In Settings → Connected devices → [Headphone name] Enable the option "Use for calls".
- 📞 Phone App Permissions: Make sure the app has access to the microphone (Settings) → Annexes → Phone. → Permits).
- 🔄 Reconnect: Turn off and reconnect the headphones.
What if the headphones are connected but there is no sound?
Features of connecting headphones of different brands
The pairing process may vary depending on the headset manufacturer. Consider the nuances for popular brands:
Xiaomi AirDots (all models)
AirDots are characterized by:
- 🔄 Automatic connection: After the first pairing, the headphones will connect to the phone when extracted from the case.
- 🎵 Mi Earphones app: Install it from Google Play to customize gestures and equalizer.
Apple AirPods
While AirPods are optimized for iPhone, they are compatible with the Redmi 9C NFC:
- 🔋 Charge level: Displayed only in third-party applications (e.g. AirBattery).
- 🎤 Microphone: Quality may be worse than on iPhone, due to optimization AAC.
- 🔄 Reset: To reset, press and hold the button on the back of the case for 15 seconds.
Sony WH-1000XM4/XM5
For Sony headphones with ANC:
- 🎛️ Headphones Connect app: Necessary for noise reduction and equalizer settings.
- 🔊 360 Reality Audio: Only works with supported services (Tidal, Deezer).
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For LDAC-enabled headphones (such as Sony) in your phone settings, select LDAC as your priority codec. This will improve sound quality but may increase latency.
How to Disable or Remove Headphones from the Device List
If you need to temporarily disable the headset or completely remove it from your phone’s memory, follow these steps:
Temporary shutdown
Just:
- Open the Quick Settings panel (swipe down from the top edge of the screen).
- Slip on the Bluetooth icon to turn off the module.
- Or click on the headphone name in the list of connected devices and select "Disable".
Complete removal (forgetting the device)
This is useful if you want to pair headphones with another phone or they work unstable:
- Go to Settings → Connection and Sharing → Bluetooth.
- Find your headphones in the list and tap the gear (⚙️) near-name.
- Select "Forget this device" and confirm the action.
⚠️ Note: Once the headphones are removed from the list, they will have to be paired again, as when you first connect. Some models (such as AirPods) may require resetting before re-pairing.
Tips for saving battery power when using Bluetooth headphones
Active use of Bluetooth increases the battery consumption of the Redmi 9C NFC.
- 🔋 Turn off Bluetooth when you're not using your headphones. Even in standby mode, the module consumes charge.
- 🎵 Reduce the sound quality: In the headphone settings, select SBC instead AAC/aptX (This will reduce the load on the processor).
- 📴 Use In-Air mode in subways or places without a network – this will turn off energy-consuming modules (Wi-Fi, mobile data), leaving only Bluetooth.
- 🔄 Update the firmware: In new versions MIUI Optimized power consumption of Bluetooth.
For headphones:
- 🔌 Store in a case: Most models (such as AirDots) automatically turn off when placed in a case.
- 🔋 Do not discharge completely: Charge headphones at charge level 20-30%, extending the battery life.
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If you listen to music through YouTube Music or Spotify, reduce the quality of streaming in the app settings. This will reduce the load on the Bluetooth module and save charge.