The procedure for detaching a wearable gadget from a smartphone is a standard operation that must be performed before transferring the device to another person, selling it or in the case of replacing the smartphone with a new model. If you plan to simply reinstall the application on the same account, a full reset may not be necessary, but for the purity of the system configuration, this is often a useful action. Understanding how to untie the Xiaomi Band 4 correctly will avoid problems with data synchronization in the future.
Incorrectly shutting down the device or removing it from the system without prior preparation can lead to the fitness tracker remaining “tied” to the old cloud storage, in which case the new user or even you on the new phone will encounter an error when trying to pair. The device will claim that it is already occupied by another account, and will refuse to work correctly, which is why it is important to clearly follow the algorithm of actions described in this article.
In this guide, we will discuss all the existing methods of disabling the Mi Smart Band 4 from the Mi Fit mobile application (now Mi Fitness) and Zepp Life. We will look at the standard methods through the smartphone menu, forced reset through the bracelet itself and actions in the event of loss of the phone.
Why You Should Untie a Fitness Tracker Before Selling
Many users underestimate the importance of unplugging a device before handing it over to third parties: When you simply delete an app from your phone or forget about the tracker, your personal data stays in the device’s memory and in the linked cloud account, posing a potential privacy threat, as the new owner could theoretically access your activity history.
In addition, it is technically impossible to fully use the Xiaomi Mi Band 4 if it is listed on another profile. Xiaomi security system blocks the device from re-activating on a new account without first unlocking on the old one. This is done to protect against theft, but creates inconvenience when legally selling.
- 🔒 Data Protection: Deleting the tracker from your account completely ensures that your geolocation, pulse, and footsteps are not accessible to anyone.
- 🔄 Change of owner: Only after detachment will the new user be able to register the bracelet on his phone and set up synchronization.
- 🛠 Problem Solving: Resetting the binding often helps to correct synchronization errors when the bracelet is “hang” in the disconnected status.
⚠️ Warning: If you sell a device, be sure to follow the in-app detachment procedure, rather than just reset the settings on the bracelet itself.A simple button reset is not enough to break communication with the Xiaomi server.
The untie process also clears the pairing key cache in the smartphone memory. Sometimes the phone's Bluetooth modules can "remember" old configurations, which prevents new devices from working properly. Deep profile cleaning helps keep connections clean.
Preparation for the procedure: Update and backup
Before you take action to disable the Mi Band 4, make sure your smartphone and tracker software is up to date.Outdated versions of Zepp Life or Mi Fitness apps may contain bugs that prevent the detachment process from being completed correctly.
It is also strongly recommended to back up your health data. Although the history is stored in the cloud, a local backup can be useful in the event of a server failure or loss of access to your account. In the application settings, find the Profile section and select the option to save data or sync.
☑️ Preparation for uncoupling
Make sure the bracelet is at least 20-30% charged. The detachment process can take several minutes, and if the device runs out at a critical moment, it can cause software firmware failure. If the charge is low, put the tracker on charge before the procedure begins.
The new app is called Zepp Life (Mi Fit).
The most common and correct way to unplug the Xiaomi Mi Band 4 is to use the official app through which the initial setup was made. In most regions, this model uses the Zepp Life app (formerly known as Mi Fit).
Open the app on your smartphone and go to the Profile tab in the lower right corner. In the list of "My devices" select your tracker. Importantly, at this point, the Bluetooth on the phone should be on, and the bracelet should be in the immediate vicinity of the smartphone (within 5-10 meters) to confirm the command.
In the device menu, scroll down to the end of the list of options, and you'll find the Unplug button (or Unpair) and the system will give you a warning that all data will be deleted from the device but will remain in your account. Confirm the action. 10-15 seconds, after which the bracelet will return to the factory settings.
⚠️ Warning: Don’t just try to remove the app from your phone without untieing the device in the menu.This won’t break the connection on the server, and the bracelet will continue to be listed behind your account, blocking the connection to new phones.
After a successful detachment, the Mi logo will appear on the screen and a suggestion to choose a language, which signals that the device is ready for a new registration. If this does not happen, try restarting the smartphone and repeat the procedure.
Unlocking through the Mi Fitness app
With the release of new versions of Android and iOS, Xiaomi has started to actively promote the new Mi Fitness app (formerly Xiaomi Wear).If you switch to this platform, the Mi Band 4 detachment procedure will have its own features. The interface here is more minimal, but the functionality remains the same.
Launch Mi Fitness and go to Devices (watch/bracelet icon). Select your Mi Band 4 from the list. In the device control menu that opens, you need to find Settings or immediately see the Unplug button at the bottom of the screen.
The app will request confirmation of the operation. You press OK, you break the connection. Unlike Zepp Life, it can take a little longer because of the synchronization of large amounts of data before the communication breaks. Wait for the message to come out.
It's worth noting that switching between apps (from Zepp Life to Mi Fitness and back) requires a complete detachment of the device. You can't just log in to a new app with the same account while the old app is holding an active connection. Unplug in one, then plug in another.
What to do if your phone is lost or your app is removed
When a smartphone is lost, broken, or simply unavailable, it is the most difficult, in which case the standard procedure through the app menu is impossible, but there are ways to solve the problem using only the wristband or the computer itself.
The first option is to reset the brast itself through the menu. On Mi Band 4, this is not always obvious. Go to Settings (cog icon) → System (or Additional) → Reset. Confirm action. This will return factory settings, but does not always untie the server account.
If a simple reset doesn’t work and the bracelet requires you to log in to your old account when trying to connect to a new phone, you’ll have to use the web version of Xiaomi’s service. log in to account.xiaomi.com from your computer, log in to your old account.
| Action. | Where to go | The result |
|---|---|---|
| Reset via menu | On the bracelet itself. | Memory clearing, but the account may remain |
| Removal from the cloud | Account.xiaomi.com | Complete decoupling of the device from the profile |
| Re-tied | New app on a new phone | It can only be done after being removed from the cloud. |
In your personal account, find the Devices or Mi Cloud section, find your tracker in the list, and select the Delete or Untie option, and then the device will be completely free for new registration, which is the only reliable method for losing your phone.
Change of ownership: transfer of rights to the account
Sometimes users don't just want to untie the device, but they want to transfer the entire account along with the story to another person. Xiaomi doesn't technically have a one-click "transfer" feature. The logic here is simple: you either give the username and password to your Mi Account, or create a new one.
If you decide to transfer your account in full, it's easy for the new owner to log in to the Zepp Life or Mi Fitness app using your credentials. All your steps and sleep data will be mixed, which is not always convenient. The better way to do that is to untie the device, as described above, and register a new account for the new owner.
Can I tie one bracelet to two phones at the same time?
It is important to remember regional restrictions: If the bracelet was purchased in China (CN version), and the account was created in Europe or Russia, there may be unbundling errors, in which case changing the region in the application settings before the unbundling procedure sometimes helps.
Solving Frequent Problems in Uncoupling
Users often experience a “failed to untie” error or endless download lap, most often due to an unstable Internet connection or temporary failures of Xiaomi servers.
If the app freezes, try the following:
1. Turn off Bluetooth on your phone, then turn it on again.
2. Force the application to close (swipe off the list of running) and run again.
3. Check if you need to update your Android system components, in particular Google Play services.
⚠️ Warning: If the bracelet stopped responding to the press after trying to unbend, don't panic. 15-20 This often takes the device out of the locking state.
In rare cases, a full smartphone reboot helps, which clears the Bluetooth stack cache that might have "remembered" the erroneous connection data, and after the reboot, immediately try repeating the detachment procedure.
💡
If nothing helps, try installing the app on another smartphone (another OS, for example, if you have Android, take an iPhone from a friend), log in to your account there and try untie the device through it.
It's also worth checking the app's access rights. In the phone settings (Settings → Applications → Zepp Life/Mi Fitness → Permissions), make sure the app is allowed to use geolocation and Bluetooth. Without those permissions, the detachment command may simply not reach the device.
Frequently Asked Questions (FAQ)
Will my footstep and sleep stats reset after the junction?
Do I need to charge the bracelet before undressing?
Can you untie Mi Band 4 without the internet?
What if the bracelet says "Connected to another account"?
Does the undrafting affect the guarantee?
💡
The correct uncoupling is not just a reset on the bracelet, but the mandatory removal of the device from the list in the application and the Xiaomi cloud account.