Modern smartphones such as Samsung Galaxy A31provide users with ample opportunities for multimedia entertainment, and the use of wireless peripherals has become standard. Eliminating wires not only adds comfort when listening to music or watching videos, but also frees up the charging connector. However, the initial setup process sometimes raises questions among those who are switching to technology for the first time Bluetooth.
In this article we will analyze in detail the algorithm of actions necessary to successfully pair your device with a headset from any manufacturer. You will learn about the nuances of the interface One UI, features of device search and ways to solve typical connection problems. Proper setup will ensure a stable signal and high quality of the transmitted audio stream.
Before you start setting up the phone software, you need to make sure that the accessories are physically ready. Most models require prior activation of pairing mode, which is often different from simply turning on the power. Ignoring this step is the most common reason that the smartphone does not see the headphones in the list of available devices.
Preparing the headphones for pairing
The first critical step is to put the headset into a special detection mode. Simply turning on the headphones is not enough, as in the normal state they try to connect to the last used device or are in standby mode. To activate the search, you usually need to hold down the power button or multifunction key for a few seconds until the indication appears.
Indicator lights on the device body serve as the main way to communicate status. Depending on the brand, the flashing sequence may vary. Most often, rapid alternate flashing in red and blue signals that the module Bluetooth is open for external connections. If the light is solid or flashing the same color, pairing mode is likely not yet activated.
⚠️ Note: Some truly wireless earbuds (TWS) models require you to remove both modules from the case and hold the touch zones on the earbuds themselves, rather than the charging case, for a long time to enter the mode.
Make sure the battery The headset is charged at least 20-30%. When battery power is low, some devices automatically limit transmit power or disable detection to save power. This may result in an unstable connection immediately after connection or an inability to complete the pairing procedure.
If the indicator does not flash as desired, try resetting the headphones to factory settings, usually this is done by holding the volume and power buttons off at the same time.
Activating Bluetooth on Samsung A31
Operating interface systems Android in the shell One UI from the company Samsung offers several ways to access the settings of wireless modules. The fastest method is to use the quick settings panel, which is called up by swiping down from the top edge of the screen. Here is an icon in the form of a stylized rune, which is responsible for turning on the radio module.
For deeper settings, it is recommended to go to the main settings menu. You need to open the application Settings and find the section Connections. This is where all the tools for managing wireless interfaces are concentrated, including Wi-Fi, mobile networks and, of course, Bluetooth. The switch in this menu must be in the active position.
After turning on, the system automatically starts scanning the airwaves. The names of nearby gadgets may appear in the “Available devices” list, but for full control it is better to go inside the menu. Click on the text inscription Bluetooth to the right of the switch to open an expanded list of paired and available gadgets. The real-time search status is displayed here.
- 📱 Make sure that the "Visibility to other devices" option is turned on in Bluetooth settings if you plan to transfer files.
- 🔄 If the list is not updating, click on the three dots in the corner of the screen and select "Refresh" to force the scan to start.
- 🔋 Turn off power saving during setup as this mode may limit background search services.
The process of pairing devices
When both devices are prepared, the name of your headset should appear on the smartphone screen Samsung A31 in the section of available devices. It usually matches the model indicated on the box, or is a set of letters and numbers characteristic of the manufacturer's chip. Clicking on this name initiates the handshake procedure and exchange of encryption keys.
In some cases, the system may request confirmation of pairing through a pop-up window with an access code. The standard PIN code for most audio devices is the combination 0000 or 1234. However, modern protocols Bluetooth versions 4.0 and higher often pair without entering a code, requiring only user confirmation on the phone screen.
Path to settings: Settings → Connections → Bluetooth → List of available devicesSuccessful connection is confirmed by changing the status of the device in the list. Instead of the message “Pairing...” the status “Connected for calls and audio” will appear. At the same time, a characteristic sound signal or voice message about successful connection is usually heard in the headphones. If the status freezes at the pairing stage, try canceling the operation and repeating the search.
| Status in the menu | Value | User action |
|---|---|---|
| Search... | Scanning air | Waiting for the name to appear |
| Pairing... | Key exchange | Do not interrupt the process, wait for the code request |
| Connected | Active connection | You can play sound |
| Paired (not connected) | The device is remembered, but the connection is broken | Click on the name to reconnect |
The “Connected” status guarantees sound transmission, while the status “Paired” only means saving the device in the phone’s memory for future connections.
Setting up audio and A2DP profile
After establishing a connection, it is important to check which profile is used for data transfer. For high-quality music playback, you need a profile A2DP (Advanced Audio Distribution Profile). If the phone is connected only using the profile HFP (Hands-Free Profile), the sound will be monophonic and of low quality, as in a telephone conversation.
In settings Samsung A31 You can manage individual permissions for the connected device. By clicking on the gear next to the name of the headphones in the Bluetooth list, you will see toggles for the Sound and Call categories. Make sure both options are enabled if you plan to use the headset universally. Disabling the “Sound” item will redirect media audio back to the smartphone speaker.
The quality of the codec also plays an important role. Although Samsung A31 supports standard codecs SBC and AAC, it may be available for high-end devices aptX. You can check the active codec in the developer menu, but for most users the standard settings provide the optimal balance between sound quality and connection stability without the need for manual settings.
⚠️ Attention: The developer menu interface is hidden by default. To activate it, you need to quickly click on the build number 7 times in the “About phone” section, after which a new item will appear in the main settings.
How to check the active codec?
Go to Settings → About phone → Software information → click on “Build number” 7 times. Then “Developer Options” will appear in the main settings. Inside, find the “Audio” or “Bluetooth” section, where you can select your preferred codec or view the current one.
Manage multiple devices
The operating system Android allows you to store many paired devices in memory, but you can usually maintain an active audio connection with only one at a time. If you previously connected your phone to a speaker or car stereo, when you turn on Bluetooth, the smartphone may automatically try to restore connection with them, ignoring the new headphones.
To prioritize the desired device, you can manually break the connection with unnecessary gadgets. In the Bluetooth list, tap the name of the unwanted device and select Disconnect. This won't remove it from memory, but it will free up the audio channel for your headset. If you need to completely remove the device, use the “Remove from paired list” or “Forget device” option.
Function Smart Switch or cloud accounts Samsung can synchronize the list of paired devices between different phones of the same owner. This is convenient, but sometimes leads to conflicts when the headphones try to connect to the tablet and not the phone. In such cases, temporarily disabling Bluetooth on secondary devices helps solve the problem.
- 🎧 Use the Multi-Point feature (if supported by headphones) to connect to two phones simultaneously.
- 🚫 Remove old, unused devices from the list to speed up the process of finding new ones.
- ⚙️ Rename your devices in Bluetooth settings for easy identification in common lists.
☑️ Diagnosing sound problems
Solving common problems
Despite proven technologies, users may encounter situations where connection is impossible or there is no sound. One of the common reasons is protocol desynchronization. If your phone sees the headphones, but when you click on the connection it gives the error “Failed to pair,” try clearing the Bluetooth cache on your smartphone through the app menu.
Interference on the air can also affect stability. Nearby microwave ovens, powerful routers Wi-Fi or other active Bluetooth devices create noise in the 2.4 GHz range. Try moving away from the source of interference or move to another room to complete the setup procedure. The distance between devices during initial pairing should not exceed 1-2 meters.
If the sound is available, but is interrupted or has low quality, check the power saving settings. “Maximum saving” mode on Samsung A31 can limit the operation of the radio module. You should also make sure that third-party equalizers or sound processing applications are not activated on your phone, which may conflict with the headset drivers.
⚠️ Attention: If the problem persists after all the manipulations, check the compatibility of Bluetooth versions. Outdated headphone models (version 2.1 or 3.0) may not work correctly with modern smartphones using Bluetooth 5.0.
Periodically clear the list of paired devices. The accumulation of more than 10-15 entries in the memory of the Bluetooth module can slow down the process of scanning and searching for new gadgets.
Frequently asked questions (FAQ)
Why does the Samsung A31 phone not see my new headphones?
Most likely, the headphones are not in pairing mode. The indicator should flash quickly (usually red and blue). Also make sure that they are not connected to another device nearby, which intercepts the signal automatically.
Is it possible to connect two pairs of headphones to one phone at the same time?
With standard Android tools it is not possible to play one track on two pairs. However, the function Dual Audio on some Samsung devices allows you to output sound to two Bluetooth devices, but this depends on the specific firmware version and model.
How to improve the sound quality when connecting via Bluetooth?
In the developer settings, you can try changing the bitrate or selecting a different codec (for example, LDAC or aptX, if they are supported both devices). Also disable any third-party sound “enhancers” that may distort the signal.
What to do if the sound comes from only one earphone?
Check the channel balance in the accessibility settings (Settings → Special. features → Improving audibility → Sound balance). Also try resetting the headphones to factory settings and reconnecting them.
Does connecting wireless headphones affect Internet speed?
No, Wi-Fi and Bluetooth modules operate at different frequencies or use time sharing technologies, so there is no significant impact on the data transfer speed. However, in rare cases, with a very weak Wi-Fi signal, micro-delays are possible.