Why Haylou RT doesn't connect to the phone: the main reasons
Xiaomi Haylou RT is a popular budget solution with wide functionality, but many users face problems when connecting for the first time.
- 📱 Incompatible version of Bluetooth (device requires Bluetooth 4.2)+)
- 🔄 Outdated firmware watches or smartphones (especially relevant for Android 10 and below)
- 📵 Active Power Saving Mode on Phone that Blocks Background Synchronization
- 🔒 OS restrictions (iPhone requires permission to notify manually)
In this article, we will discuss 3 official ways of connecting (via Mi Fitness, Zepp Life and manually), as well as solve typical errors like "Device not found" or "Synchronization interrupted." All instructions are relevant for firmware 2023-2026.
Preparation for connection: what to do before pairing
Before you start setting up, follow the mandatory steps:
☑️ Preparation of devices
Pay special attention to the firmware versions of the watch. The Haylou RT has two modifications:
- 🕒 RT (LS05) — Basic version with screen 1.28" and 10 modes of sports
- 🕒 RT Pro (LS05 Pro) - improved with sensor SpO2 and 14 regimes
Check the version in the menu of the watch: Settings → About the device → Software version. If the firmware is older than 1.2.6.4, update it through the official application.
⚠️ Note: On iPhone, before connecting, disable the “Advertising Tracking Restriction” function in Settings → Confidentiality → Apple Advertising.Otherwise, call notifications may not arrive.
| Parameter | Android | iOS |
|---|---|---|
| Minimum OS version | Android 6.0 | iOS 12.0 |
| Required version of Bluetooth | 4.2+ | 5.0+ |
| Official annex | Mi Fitness or Zepp Life | Only Zepp Life. |
| Support for notifications | Yeah (all types) | Just calls and calls. SMS |
Method 1: Connect via the Mi Fitness app (recommended for Android)
This is the most reliable method for owners of Xiaomi, Redmi or POCO smartphones.
- Download Mi Fitness from Google Play (version no lower than 5.12.0).
- Sign in or sign in through your Xiaomi/Mi Account.
- Turn on the Haylou watch RT Pair mode: Press the button for 3 seconds until it appears QR-code.
- In the app, click "Add device" → "Bracelet" → "Haylou RT".
- Scan it. QR-code from the watch screen or select a device from the Bluetooth list.
If the clock is not set, check:
- 🔍 Application permissions (access to Bluetooth, Notifications, Contacts)
- 📶 Internet connection stability (the application downloads drivers on the first connection)
- 🔄 Reboot the clock (press the 10 seconds button before vibration)
💡
If after connecting to Mi Fitness, the error “Data is not synced” is displayed, go to the phone settings → Annexes → Mi Fitness → Memory. → Clear the cache.
Method 2: Sync with Zepp Life (for Android and iOS)
The Zepp Life app (formerly Amazfit) is universal for all Haylou devices and is better optimized for iPhone.
- Install Zepp Life (App Store) or Zepp (Google Play).
- Create an account or sign in via Google/Apple ID.
- Turn on the clock search mode (QR-screen-code).
- In the app, click "Profile → Add Device → Haylou → RT".
- Confirm pairing on your phone and watch (click the button on Haylou RT).
On the iPhone, after connecting, you must manually allow notifications:
iPhone settings → Bluetooth → Click on “i” next to Haylou RT → Enable “Show notifications”⚠️ Note: On iOS, notifications from third-party messengers (WhatsApp, Telegram) are not supported due to Apple restrictions. SMS call.
How to reset Haylou RT to factory settings?
Method 3: Manual Bluetooth connection (without applications)
If the official apps don’t work, you can connect the watch like a normal Bluetooth device, which only gives you access to the basic functionality (time, steps, alarm clock), but doesn’t sync notifications.
- Activate the search mode on the clock (QR-screen-code).
- On the phone, open Settings → Bluetooth.
- In the list, find the device "LS05" (or "Haylou RT") and click "Connect".
- Confirm the pairing on the watch (button) and phone.
To synchronize time:
- 🕐 On Android: After connecting, the time is automatically updated.
- 🕐 On iPhone: Go to Settings → Mainstream → Date and time → Auto-installation.
💡
Manual Bluetooth connectivity does not replace full sync through the app. Without Mi Fitness/Zepp Life, you will lose access to activity history, dial settings and notifications.
Solving problems: the clock is not connected or switched off
If Haylou RT is not visible in the list of devices or the connection is constantly breaking, check:
| Problem. | Reason. | Decision |
|---|---|---|
| The watch is not in search | Battery discharged or software failure | Charge up to 30%+ or reset the settings |
| Synchronization interrupted | Interference from other Bluetooth devices | Turn off headphones, speakers, fitness trackers |
| The application is hung on "Connection..." | Cache conflict | Clear the application data in the phone settings |
| There are no notifications on iPhones | Limitations of iOS | Allow notifications manually (see above) |
To diagnose your Android connection, use the hidden Bluetooth menu:
1. Open the telephone keyboard.
2. Enter ##4636##.
3. Select "Bluetooth Information".
4. Check the connection status to LS05.Configure notifications and additional functions
After successful connection, set up alerts and clock settings:
- Notifications: 📱 In Mi Fitness: Profile → Haylou RT → Notifications → Select applications. 📱 In Zepp Life: The Device → Notification settings.
Dials:
Mi Fitness → Dials
Sleep/heart monitoring:
Watch settings → Modes → Monitoring 24/7
Alarm clocks:
Menus. → Alarm clock
💡
To extend the Haylou RT’s life, turn off continuous heart rate monitoring (saves up to 30% charge). To do this, go to Clock Settings → Modes → Measurement Frequency and select Manual.