How to transfer and tie Xiaomi Mi Band 4 to another smartphone: full instructions

The Xiaomi Mi Band 4 fitness bracelet remains a popular gadget even years after its release — its reliability, long battery life and wide functionality (from sleep monitoring to notifications) make the device relevant. But what if you change your smartphone and need to tie the bracelet to a new phone? The process seems simple, but many face synchronization errors, lost data or inability to connect.

In this article, we’ll look at all the ways you can transfer the Mi Band 4 to another phone, from the standard procedure through the Mi Fit app to manually resetting your settings and solving typical problems. You’ll learn how to keep your activity history, why the bracelet might not connect to a new device, and what to do if the Mi Band 4 “can’t see” your smartphone. The instructions are relevant for Android and iOS, with the latest versions of Xiaomi apps in mind.

Preparation for transfer: what to do before the bracelet is unbundled

Before you tie the Mi Band 4 to another phone, it is important to prepare properly, and negligence at this stage can lead to data loss (steps, sleep, workouts) or synchronization problems.

• 📱 Update the Mi Fit or Zepp Life app on old and new phones.Outdated versions often conflict with the bracelet.

If you’re using Mi Band 4 on your iPhone, note that the Mi Fit app for iOS has limited functionality compared to the Android version. For example, some notifications may not come and alarm settings sync longer, and you can’t use alternative firmware (like Notify & Fitness for Mi Band) available on Android on iOS.

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If you plan to sell an old phone, remove your Xiaomi account from your device settings (Settings → Accounts → Xiaomi) and this will prevent the new owner from accessing your data from the wristband.

Method 1: Standard binding via Mi Fit (without resetting the bracelet)

The easiest way to transfer the Mi Band 4 to another phone is to log in to the same Xiaomi account on a new device, which will avoid resetting the bracelet settings and save all data.

1. Install Mi Fit or Zepp Life on your new smartphone from the App Store/Google Play.
2. Sign in to the app under the same Xiaomi account as your old phone.
3. Turn on Bluetooth on your new phone and wait for the app to detect the bracelet.
4. Confirm the connection on the bracelet screen (click on the touch button).

If the bracelet does not appear in the list of devices, try:

• 🔄 Reboot Mi Band 4 (press the touch button for 10 seconds until vibrations appear).
• 🔗 Shut down. VPN Proxies – they can block the connection to Xiaomi servers.

The latest update to Mi Fit has been installed|Bluetooth is enabled and visible for other devices|Bracelet charged at least 50 times%|Xiaomi account is the same on both phones-->

Important: If the old phone was enabled two-factor login to the account Xiaomi, when logging in to the new device will require confirmation via SMS or email.

Method 2: Forced resetting of Mi Band 4 before binding

If the standard method doesn’t work (e.g., the bracelet doesn’t see a new phone or gives a sync error), you’ll need to reset the Mi Band 4 completely, which will delete all the data from the bracelet, but allow you to connect it to another smartphone.

1. Untie the bracelet from your old phone: Open Mi Fit → Select Mi Band 4 → Device settings → Untie. Confirm the action (the bracelet vibrates).

Connect to a new phone

:

• In Mi Fit on the new smartphone, click Add Device → Bracelet → Mi Smart Band 4.

Once reset, the bracelet will return to factory settings.

• ✅ Fixes most connection errors (e.g., error code 10008 or 50001).

Table: Frequent Mi Band 4 binding errors and their solutions

If your error isn’t listed in the table, try an alternative app like Notify & Fitness for Mi Band (Android only).It supports Mi Band 4 and sometimes copes with connecting where Mi Fit refuses to work.

Android|iOS|Other (specify in the comments)-->

Transfer data from Mi Band 4 to a new phone: what will and will not survive

One of the big questions when you tie the bracelet to another smartphone is, will the activity data be maintained? The answer depends on how you did the transfer.

• ✅ Saved if: You logged in to the same Xiaomi account on the new phone before the bracelet detachment.The data was synchronized with the Xiaomi cloud prior to reset.

To check if the data is still there, open Mi Fit on your new phone and go to Statistics, and if the activity charts are blank, then the story hasn't moved on.

1. Restore data from backup (if you backup through Settings → Account → Backup to Mi Fit).
2. Export your story from your old phone in.csv format (in Mi Fit → Profile → Settings → Export data).

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Data from Mi Band 4 is only stored in the Xiaomi cloud for 30 days. If you haven’t synced the bracelet for more than a month, your activity history can be lost forever.

On iOS there is another feature: the Mi Fit application does not store data on the pulse and oxygen levels in the blood (SpO₂) If you care about these metrics, export them manually once a week.

Features of binding Mi Band 4 to phones of different brands

While the Mi Band 4 officially supports Android 5.0+ and iOS 10.0+, there may be some nuances depending on the smartphone manufacturer.

• 📱 Xiaomi/Redmi/POCO: Maximum compatibility: the bracelet connects without errors. MIUI Additional features are available (for example, unlocking the screen through the bracelet).
• 🍎 iPhone: Limited functionality - no support for alternative firmware. Notifications come with a delay (due to iOS restrictions).

On Huawei and Honor phones with EMUI, you sometimes need to manually allow Mi Fit to run in the background:

1. Go to Settings → Applications → Mi Fit → Battery.
2. Turn off Start Control and turn on Auto Start.
3. Add Mi Fit to the list of Protected Apps.

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On Samsung phones, before connecting the Mi Band 4, turn off the dual Bluetooth service feature in Bluetooth settings. It can interfere with stable connection.

How to tie Mi Band 4 to two phones at the same time

Officially, the Xiaomi Mi Band 4 does not support simultaneous connection to two smartphones, but there are workarounds that allow you to receive notifications on both devices (for example, if you have a work and personal phone).

Method 1: Alternating connections

You can manually switch the bracelet between phones:

1. Connect Mi Band 4 to the first phone (main).
2. When you need to use a second phone, untie the bracelet in the Mi Fit and connect it to the second device.
3. Return to the first phone when necessary.

The downside of the method: the data is not synchronized automatically – you will have to manually update the statistics on each phone.

Method 2: Use of alternative applications (Android only)

Apps like Notify & Fitness for Mi Band or Mi Band Master allow you to:

• 📱 Connect the bracelet to several phones alternately (but not simultaneously!).
• 🔔 Set up notifications separately for each device.
• ⚙️ Use advanced features (e.g. custom dials).

Importantly, this approach will stop the official Mi Fit app working with the bracelet, and there may be bugs in displaying notifications or monitoring sleep.

What to do if Mi Band 4 is not connected to a new phone

If you have completed all the steps, but the bracelet stubbornly does not want to connect, check the following points:

⚠️ Attention: On Android 12 phones+ iOS 15+ You can use a restriction on applications accessing Bluetooth in the background. Allow Mi Fit to use Bluetooth without restrictions in the system settings.

• 🔍 Mi Band 4 doesn’t work with phones without Bluetooth 4.2 LE. iOS requires a version not lower than iOS 10.0.

If nothing helps, try connecting the bracelet to another phone (borrow from a friend) to help determine if the bracelet or your smartphone is having a problem. If the Mi Band 4 is not connecting to any device, the Bluetooth bracelet module may have malfunctioned (repair required).

FAQ: Frequent questions about the Mi Band tie-up 4