Xiaomi Haylou T15: how to connect to a smartphone and fix errors

Why the Haylou T15 needs a special approach

Xiaomiโ€™s Haylou T15 headphones have gained popularity due to their balance of price, sound quality and battery life. However, their connection to a smartphone often raises questions among users โ€” especially if it is a first pairing or changing device. Unlike the flagship AirPods or Sony WF-1000XM5 models, there is no automatic recognition through an Apple W1 or Sony LDAC chip, so the process requires precise execution of steps.

The main difficulty lies in dual-mode Bluetooth: T15 Support both standard protocol and Low Latency for gaming. Incorrect mode choices can lead to interruptions or delays. In addition, many users face the problem of having headphones defined as two separate devices (Haylou_T15_L and Haylou_T15_R) In this article, we'll go through all the nuances, from basic connectivity to solving rare bugs.

Preparing headphones for the first connection

Before pairing with the phone, you need to take the Haylou T15 out of sleep and activate the search mode.

  • ๐Ÿ”‹ Charge your headphones: even if the indicator shows a charge, connect the case to the power source for 10-15 minutes. The minimum charge level for successful pairing is 20%.
  • ๐Ÿ“ฆ Remove the headphones from the case: they must automatically turn on (blitzes white indicator).If this does not happen, press and hold the touchpad on both headphones for 3 seconds.
  • ๐Ÿ”„ Reset previous settings (if the headphones have already connected to another device): pinch the touch panels for 10 seconds until the indicators start flashing red and white.

Important: if the headphones are lit red, this indicates a low charge (<10%), in which case the connection may be interrupted during the pairing stage, also make sure that the case is not in energy saving mode (if its indicator does not respond to the opening of the cover, connect the case to the charging).

Charge the case and headphones up to 30% |

Remove both earphones from the case|

Make sure the white indicator flashes |

Reset settings (when reconnected)|

Disable other Bluetooth devices within a 5-meter radius

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Step-by-step: Connecting to Android

The algorithm for pairing with Android devices (including Xiaomi, Samsung, Realme and others):

  1. Open Settings โ†’ Bluetooth on your smartphone and activate the module.
  2. Click Device Search (or Add a new device).
  3. In the list, find two devices: Haylou_T15_L (left-ear headphones and Haylou_T15_R (Choose one with an "R" in the title, which syncs both earbuds automatically.
  4. Confirm the pairing on the phone (entry may be required) PIN-code - by default 0000).
  5. Wait for the sign to appear Connected under the device name.

If the headphones are defined as separate devices (for example, the list displays both separately), follow the following steps:

  1. Remove both devices from the list of conjugates.
  2. Put the headphones back in the case, close the lid for 10 seconds.
  3. Repeat the connection process by selecting Haylou_T15_R.

๐Ÿ’ก

If the headphones only connect one at a time, try updating the firmware through the official Haylou Fun app (available on Google Play).

Connection to iPhone (iOS) and features of work

On Apple devices (iPhone, iPad), the pairing process is identical, but there are nuances with Bluetooth codecs. By default, iOS uses AAC, which can cause audio delays in games or videos. To optimize the work:

  1. Open Settings โ†’ Bluetooth and activate the search.
  2. Choose. Haylou_T15_R list.
  3. After connecting, go to Settings. โ†’ Bluetooth โ†’ Haylou_T15 โ†’ Information (i).
  4. Turn off the Auto Switch option to this device if the headphones are arbitrarily connected to other Apple gadgets.

To reduce the latency of sound in games:

  • ๐ŸŽฎ Use Low Latency mode (activated by triple touching the touchpad on any headphone).
  • ๐Ÿ“ฑ Close background apps, especially instant messengers with voice messages.
  • ๐Ÿ”Š In iPhone audio settings, select High Quality (in some games, this reduces the lags).
๐Ÿ“Š What OS are you using with Haylou? T15?
Android
iOS
Windows (for calls)
Other

Modes of operation and their setting

The Haylou T15 supports three main modes, switched through touch panels:

Regime.Activation.AppointmentBattery consumption
Stereo (A2DP)Double touch.Playing music/podcastsAverage (~5%/hour)
Mono (HFP)Triple touch.Calls (microphone only on the right earpiece)Low (~3%/hour)
Low LatencyFour touchesGames/video (delay <100 ms)High (~8%/hour)

By default, the headphones are turned on in A2DP mode (stereo). HFP is automatically activated for calls, but if the microphone is not working, check:

  • ๐Ÿ”Š The right side ( R) should be the leading (its indicator flashes more often).
  • ๐Ÿ“ฑ On Android, give permission to access the microphone in Bluetooth settings.
  • ๐Ÿ”„ Reconnect the headphones if the sound disappears after the bell.
How to reset the microphone settings?
If the microphone stopped working after the firmware update, perform a full reset: 1. Place the headphones in the case. 2. Press the touch panels on both headphones for 15 seconds (the indicators will light up red). 3. Reconnect to the phone by selecting HFP mode manually (triple touch).

Common mistakes and their solutions

Even with the right connection, users face typical problems, and here are the most common ways to fix them:

โš ๏ธ Warning: if the headphones only connect one at a time, don't try to pair them separately, it will lead to desynchronization. Haylou_T15_R device-list.

Problem.Reason.Decision
Headphones are undetectableLow charge, Bluetooth conflictCharge the case, reboot the phone, remove old Haylou devices from the list
The sound is interrupted.Interference from Wi-Fi or other devicesTurn off Wi-Fi or go to Low Latency mode
The microphone is not working.Inactive HFP modeTriple touch to switch to call mode
Different volumes in headphonesContamination of speakers or desynchronizationClean the grids, reset the settings (10-second hold)

If after all the manipulations the headphones continue to turn off, check:

  • ๐Ÿ“ฑ Bluetooth version on your phone: Haylou T15 require Bluetooth 5.0+. Older smartphones (like the Redmi Note 5) may have stability issues.
  • ๐Ÿ”‹ Case battery status: If it is discharged below 10%, headphones will not be able to sync.
  • ๐Ÿ”„ Firmware: Update it with Haylou Fun app (available for Android).

๐Ÿ’ก

If the headphones go off after 5-10 minutes, the problem is with the phone's power saving settings. Add the Haylou T15 to the battery optimization exception list (on Android: Settings โ†’ Battery โ†’ Optimization โ†’ All apps).

Additional features and hidden capabilities

In addition to the basic features, the Haylou T15 supports several hidden options that are not mentioned in the official manual:

  • ๐ŸŽต Customization of control: through the application Haylou Fun can reassign actions for touch (for example, double touch to start the voice assistant).
  • ๐Ÿ”Š Equalizer: in the same application available presets of sound (Bases, Vocals, Classics).
  • ๐Ÿ“ก For the street mode: activated by holding the touch panel for 2 seconds - high frequencies are amplified for better audibility in noisy environments.
  • ๐Ÿ”‹ Fast charging: 10 minutes in a case gives up to 1.5 hours of playback (when using a Type-C cable with Quick Charge support).

To activate the For Street mode:

  1. Put your headphones on.
  2. Hold the touchpad on any headphone until you hear the beep.
  3. The indicator will flash blue - the mode is active.

This mode is useful for cyclists or runners, but increases battery consumption by ~20%.To turn it off, repeat the panel holding.

FAQ: Answers to Frequent Questions

Can I connect the Haylou T15 to a PC or laptop?
Yes, but with nuances: On Windows 10/11: Turn on Bluetooth, select Haylou_T15_R The microphone may require manual switching to the Control Panel. โ†’ Sound. On macOS, it's the same process as the iPhone, but in some cases, you'll have to manually select Haylou. T15 as an input/output device in System settings โ†’ Note: Low Latency mode on PCs may have audio artifacts due to Bluetooth drivers.
Why do headphones discharge quickly?
Main reasons: Low Latency mode (consumption ~8%/hour vs. 5% in standard mode) Active mode For street or volume above 80%. Old software: update the firmware through Haylou Fun. Tip: turn off the headphones from Bluetooth when not using - they consume ~1%/hour even in a case if connected to the phone.
How to update the firmware on the Haylou T15?
Instructions: Download Haylou Fun from Google Play (not available for iOS). Connect your headphones to your phone. Open the app, go to Devices โ†’ Haylou T15 โ†’ Software Update. Follow the on-screen instructions (don't turn off your headphones during the process!). Update time: ~3-5 minutes. Once complete, the headphones will automatically reboot.
Can I use one headphone separately?
Yes, but with limitations: Left ( L) earphone only works in pairs with right. Right ( R) can be used separately in Mono mode. For self-use of right earphone: Connect both earphones to the phone. Place left earphone in case. Right earphone automatically switches to Mono mode.
What if the headphones are not synchronized with each other?
Algorithm of solution: Remove both devices (Haylou_T15_L and Haylou_T15_R) Put the headphones back in the case, close the lid on the case. 10 Take both of your earbuds out and wait for the white light to flash. Haylou_T15_R. If the problem recurs, reset settings (hold the touch panels on both headphones). 15 Seconds until the indicators turn red).