Wireless headsets series i9s have become a real hit in the budget peripherals market due to their affordability and ease of use. These devices are classic TWS headphones (True Wireless Stereo), which operate using the Bluetoothprotocol. However, despite the simplicity of the design, the initial setup often raises questions among users, especially when it comes to synchronizing the two parts of the headset with each other before connecting to a smartphone.
The process of pairing with the operating system Android may differ depending on the firmware version of the device itself and the shell of your phone. Sometimes the system sees them as two separate devices, which requires manual pairing. In this article, we will analyze in detail the algorithm of actions that guarantees a successful connection and stable operation of the audio channel.
If this is your first time holding such a gadget in your hands, do not rush to immediately look for settings in your phone. A critical step is to properly initialize the headphones themselves inside the case. It is this step that is often missed, which leads to sound desynchronization or lack of communication with one of the speakers.
Preparing the device for the first time
Before activating the search mode on your smartphone, you need to make sure that batteries headsets are charged. Take both earbuds out of the charging case and carefully inspect the metal contacts. They should not have a protective film, which is often installed by manufacturers to prevent discharge during storage.
Remove the insulation, if present, and insert the headphones back into the case until you hear a characteristic click. The indicators on the cases should light up, signaling the start of charging. If the light indicators do not respond, check the charge of the case itself via the cable micro-USB or Type-C.
⚠️ Attention: If the indicators flash in different colors or do not light up at all after removal, the contacts may be oxidized or discharged. Leave the device on charge for at least 30 minutes before attempting to connect.
Once you are sure there is charge, remove both headphones at the same time. At this moment they should automatically turn on and start looking for each other to create a stereo pair. This is usually accompanied by rapid flashing of the indicators. Only after one earphone stops blinking (or starts blinking slowly) and the second one continues searching, you can proceed to setting up the phone.
Keep the headphones next to each other (at a distance of 5-10 cm) when you turn them on for the first time so that they quickly find a pair with each other.
Activating Bluetooth on a smartphone and searching for a device
Now let's move on to setting up your mobile device. Unlock the screen and lower the notification shade from top to bottom. Find the Bluetooth icon and click on it to activate the wireless module. For deeper settings, it is better to go to the full settings menu.
Go to section Settings → Connections → Bluetooth (the path may vary slightly depending on the smartphone model, for example, Samsung, Xiaomi or Huawei). Make sure the switch is in the active position. The phone will begin automatically searching for available devices within range.
- 📱 Make sure that Visibility is turned on so that other devices can detect your phone (although this is not always necessary for connecting headphones).
- 🔋 Turn off power saving during pairing, as it may limit the operation of the Bluetooth module.
- 🔄 If the list does not update for a long time, press the button updates or reconnect the module.
In the list of available devices you should see the name i9s or i9s TWS. Please note: if you see two devices with the same name, this means that the headphones are not synced with each other. In this case, connecting to the phone will not provide stereo sound.
The pairing process and creating a stereo pair
Click on the device name in the list of your smartphone. The system will ask for confirmation for pairing. Click OK or Pair. In most cases, a confirmation code is not required, but if the system asks for a PIN code, the standard combinations are 0000 or 1234.
Successful connection is confirmed by a voice message inside the headphones (usually the phrase “Connected” or “Connected”) and a change in the blinking pattern of the indicator. The audio should now play through the headset. Check the channel balance by turning on the music.
| Indicator status | Value | User action |
|---|---|---|
| Fast flashing (blue/red) | Pair search mode | Select device in the phone menu |
| Slow flashing (blue) | Successful connection | Start using |
| Continuous light (red) | Charging in progress | Wait until fully charged |
| No signal | Discharge or shutdown | Check charge case |
If the sound comes from only one earphone, you need to perform a reset procedure. To do this, remove the device from the list of paired ones in the phone settings (Forget this device), put the headphones in the case, close the lid for 10 seconds, then remove them again and wait until they synchronize with each other before connecting again.
☑️ Checklist for successful connections
Audio setup and function control
After connecting, you can customize the playback settings for yourself. In the menu Settings → Sound you can select a quality profile or equalizer. Many users do not know that tracks and calls are controlled through touch panels or mechanical buttons on the cases i9s.
The standard control scheme usually looks like this: a single click is responsible for pausing or playing, a double click is for switching the track forward, and a triple click is for backwards. Holding the button for 2-3 seconds often activates the voice assistant or rejects an incoming call.
However, the implementation of touch controls in budget models can be unstable. Sometimes you need to press a little harder or hold your finger longer. If the control does not work, check whether the earphone is firmly attached to your ear, as some capacitive sensors react to skin contact.
⚠️ Attention: Do not try to adjust the equalizer with third-party applications immediately after connection. First, make sure that the basic connection is stable and there are no audio delays.
Secret reset function
If the standard reset does not help, try holding the touchpads of both earbuds at the same time for 10-15 seconds until the indicators flash 3 times in a row. This will forcefully reboot the internal controller.
Solving common connection problems
Often users are faced with a situation where the phone sees the headphones, but the connection is lost after a few seconds. This may be caused by a version conflict Bluetooth protocols or interference from other wireless devices (Wi-Fi routers, microwaves).
Try to move away from the source of potential interference. It is also worth checking if the headphones are connected to another device that was paired earlier. i9s may automatically try to reconnect with the last active gadget, ignoring your current phone.
- 🚫 Clear the Bluetooth cache in the phone settings (
Settings → Applications → Show system → Bluetooth → Storage → Clear cache). - 📡 Restart your smartphone to clear network stack errors.
- 🔌 Check the charge of the case - low voltage can cause unstable operation of the transmitter.
If the problem persists, it may be the case there is a hardware malfunction of one of the modules. Try connecting the headphones to another smartphone. If they work correctly there, the problem lies in the settings of your main device.
90% of problems with connecting i9s are solved by completely resetting the headphone settings (deleting from the phone memory + resetting in the case) and re-synchronizing the pair.
Features of the microphone and quality communications
It is important to understand the technical limitations of the model i9s. In most revisions of these headphones, the microphone is built into only one of the channels (usually the right one). This means that during a conversation, the second earphone only works for playback, and voice transmission goes through one module.
When using in hands-free mode or in instant messengers (WhatsApp, Telegram), make sure that the correct audio source is selected in the call settings. If the other person complains about a quiet voice, check whether the microphone is blocked by a finger or clothing.
The quality of voice transmission greatly depends on the distance to the phone. When moving more than 5-7 meters, especially through walls, the signal may be interrupted. This is normal behavior for budget chips Bluetooth 5.0 or earlier versions used in this series.
Why are the headphones connected as two different devices?
This happens when the synchronization between the left and right ear is broken. The headphones “forgot” each other and operate in mono mode. Solution: remove both devices from the phone's memory, put them in the case, close the lid, then remove them at the same time and wait until one stops blinking.
How to increase the volume if it is too quiet?
Check the “Absolute volume level” settings in the developer menu on Android. Also make sure that in the application itself (player or YouTube) the slider is turned up to maximum, since sometimes the volume levels of the phone and headset are not synchronized.
Can only one earphone be used?
Yes, the i9s model supports mono mode. You can take just one earbud out of the case and it will automatically connect to your phone. The second earphone will remain in sleep mode.
What to do if the indicator is not lit?
Most likely, the device is completely discharged or the contacts have oxidized. Try cleaning the contacts with a cotton swab and alcohol and leaving the case on charge for a long time (1-2 hours). If it doesn’t help, the battery may be damaged.
Are i9s compatible with iPhone?
Yes, these headphones are universal and work with any operating system that supports the standard Bluetooth protocol, including iOS, Android and Windows.