Mi Band 4 does not turn on after reset to factory settings: full recovery instructions

Resetting the Xiaomi Mi Band 4 to factory settings is standard procedure when selling, transferring a device or fixing software failures. However, many users face a problem: after a hard reset, the bracelet ceases to respond to presses, does not vibrate or connect to the phone, the reason is not because of the breakdown, but because of the features of the activation of the Mi Band 4 after complete zeroing of data.

Unlike newer models (such as the Mi Band 6 or Mi Smart Band 7), the fourth version requires forced synchronization with the app to re-energize. Simply pressing a button or connecting to charge won't work here. In this article, a detailed algorithm for actions, possible errors and ways to fix them, and answers to frequent questions.

If your Mi Band 4 bracelet shows only the Mi logo after reset and goes out or does not show signs of life at all, do not rush to carry it to the service. In 95% of cases, the problem is solved in 5-10 minutes using a smartphone and the official Mi Fitness app. The main thing is to follow the steps instructions and not miss key moments that many do not know about.

Why does Mi Band 4 not turn on after resetting?

Factory reset on the Mi Band 4 erases not only user data (steps, pulse, notifications), but also system sync files. Without them, the bracelet cannot download the firmware and activate itself. This is done to protect against unauthorized access - the device is "freezed" before connecting to an authorized Xiaomi account.

The main reasons for the “dead” state after rest:

• 🔋 If the reset occurred at a charge level below 10%, the bracelet will not be able to complete the activation procedure.
• 📱 Mi Band 4 requires re-attachment to the phone via Mi Fitness.
• 🔄 Interrupted resetting process: If during data zeroing, the bracelet was disconnected from charging or lost communication with the smartphone.
• 🛠️ In rare cases, a reset can cause system files to fail (most often after unofficial firmware).

It is important to distinguish between software locking (solved by synchronization) and hardware failure (required repair).If the bracelet does not respond to charging (no indication), does not vibrate when the cable is connected, and is not detected by the phone, the problem may be in the power controller or battery.

⚠️ Warning: Do not try to wake up the bracelet with multiple clicks on the button. This can lead to a system freeze. If after 3-5 short presses there is no reaction, proceed to sync through the application.

Preparation for Including: What to Do Before Activation

Before you start rebuilding the Mi Band 4, make sure all the preconditions are met, which will save time and avoid the typical mistakes.

Preparation checklist:

Charging the bracelet (minimum 20%|Mi Fitness application installed (version 5.6)+)|Bluetooth is on and GPS phone-on|Xiaomi account authorized in Mi Fitness|The bracelet is disconnected from other devices (if it was in a pair before)-->

Pay special attention to the app versions.Older versions of Mi Fit (until 2022) may not support re-activating the Mi Band 4 after reset.Update the program via Google Play or the App Store.

If the bracelet was previously linked to another Xiaomi account, it must be removed from the list of devices in the profile settings, otherwise the new phone will not be able to connect.

1. Open Mi Fitness on your old phone.
2. Go to Profile. → My devices.
3. Click on Mi Band 4 and select “Delete Device”.

Step-by-step: how to turn on Mi Band 4 after reset

If you have completed your preparation, go to the main activation algorithm, and the instructions are suitable for bracelets on the official firmware (Chinese or global).

Step 1. Charging the bracelet

Connect the Mi Band 4 to the charger for 10-15 minutes, even if the indicator is not on. Use the original cable or certified analogue. The bracelet will not turn on if the charge level is below 5% - this is a hardware limitation.

Step 2 Launching the Mi Fitness app

1. Open Mi Fitness on your phone.
2. Press "+" or "Add device" in the upper right corner.
3. Choose a bracelet. → Mi Smart Band 4.
4. Allow the app to access Bluetooth, Notifications and Geodata.

Step 3: Sync with the bracelet

• 🔍 Wait until the app finds Mi Band 4 in the list of available devices.
• 📲 Click on the bracelet name and confirm the pairing.
• 🔄 Follow the instructions on the screen: the application will automatically update the firmware and activate the device.
• ✅ After successful synchronization, the bracelet vibrates and displays the main menu.

If you have a “failed to connect” error during the synchronization step, try:

• 🔄 Reboot your phone and bracelet (hold the 10 seconds button).
• 📱 Remove the Mi Fitness app cache in your phone settings.
• 🔌 Connect the bracelet to another USB-port or charger.

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If the bracelet isn't determined by the app, try turning on the developer mode on the phone and turning off battery optimization for Mi Fitness.This often solves Bluetooth connectivity issues.

Frequent errors and ways to fix them

Even with the right instructions, users have difficulty, and let's look at typical scenarios and solutions.

If none of the methods worked, try an alternative activation method through the Mi Band Master app (available for Android), which allows you to manually flash the bracelet, but requires technical skills.

⚠️ Note: The use of informal firmware can lead to loss of warranty and unstable operation of sensors.

How to Avoid Mi Band 4 Discharge Problems in the Future

In order not to face difficulties in the next zeroing settings, follow these recommendations:

Safety discharge rules:

• 🔋 Always drop the bracelet when the charge level is above 50%.
• 📱 Use the same Xiaomi account to re-link.
• 🔄 Do not interrupt the reset process (do not turn off Bluetooth or charging).
• 📥 Regularly update your firmware through Mi Fitness.

If you plan to sell or transfer the bracelet, complete the reset via the device menu:

1. On the bracelet, go to Settings → Additional → Reset.
2. Confirm the action by pressing the button.
3. Wait for the process to be completed (the bracelet vibrates and reboots).

Once reset, Mi Band 4 automatically unplugs your account, but you still need an app to reactivate it. Save this instruction so you don't have to look for a last-minute solution!

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Resetting via the wristband menu is safer than through the app, as it eliminates interruption due to Bluetooth issues.

Hardware malfunctions: when without service can not do

If all software methods are exhausted and the bracelet is still not turned on, the problem may be a hardware breakdown.

Symptoms of malfunction:

• 🔌 Bracelet does not respond to charging (no indication, cable does not warm up).
• 💧 You can see traces of corrosion or moisture under the body.
• 🔥 Smell of a burn or a bloated battery.
• 📉 The charge level drops to 0% in a few minutes.

The most common hardware problems of Mi Band 4:

For a diagnosis, contact Xiaomi Service Center or a proven workshop. Don’t disassemble the bracelet yourself, it will lead to loss of water protection and can aggravate the breakdown. In most cases, repairing the Mi Band 4 is not economically feasible (the price of a new device starts from 1,500). ₽), But replacing the battery or cleaning contacts is quite realistic.

Alternative activation methods (for experienced users)

If standard methods have failed and the bracelet is still showing signs of life (vibrates, charges), you can try hand-held firmware via PC, which requires technical skills and is only suitable for the Mi Band 4 on global firmware.

Tools required:

• 🖥️ Windows computer 10/11.
• 🔌 Firmware cable (e.g, FT232RL Or a special adapter for the Mi Band).
• 📁 Firmware for Mi Band 4 (you can download it on the forums) 4PDA or XDA Developers).
• 🛠️ Programme MiBand4Tools or flashtool.

Instructions:

1. Connect the bracelet to the adapter and PC.
2. Run the firmware program and select a file with the.fw extension.
3. Start the process (usually the Flash or Start button).
4. Wait until the bracelet is completed (reboot automatically).

⚠️ Warning: Wrong firmware can permanently disable the bracelet. Use only files intended for your Mi Band 4 version (check model number on the case).

After successful firmware, the bracelet will be activated in initial configuration mode, and then it can be linked to the Xiaomi account via Mi Fitness, as described above.

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Before you run your PC firmware, back up your bracelet data if possible, and use apps like Notify & Fitness for Mi Band (available for Android).

FAQ: Answers to Frequent Questions