Setup of Xiaomi smart watches 4C For the child: a complete guide with photos and tips

Smart watch Xiaomi Mi Bunny 4C — It's one of the most popular devices for kids among parents who want to stay in touch with their kids, control their location, and limit their time with their gadgets, but after they buy, many people have problems with their watches not connecting to their phones, not detecting their phone. GPS or make errors when setting up SIM-This article will help you understand all the nuances from the first inclusion to fine-tuning parental control.

We're not just going to list menu items, but you'll find practical tips that save time, like why Mi Bunny is a good idea. 4C Do not see satellites in the room (and how to fix it), how to get around the error SIM" Why are the clocks going off and SMS — We'll also look at the hidden "School Mode" feature, which is not in the official manual, but which keeps the child from constantly calling in the classroom.

This article is relevant for firmware 2023-2026, and if your watch is released earlier, some menu items may differ, we will warn you about this separately.

1. Preparation for setting up: what to do before turning on the clock

Before pressing the power button on Xiaomi 4C, Check out three key points. Ignoring them causes 80 percent of the problems when you set up:

• 📱 Smartphone compatibility: the watch only works with Android 5.0+ or iOS 9.0+. On Huawei with EMUI 10+ You may need manual resolution for the Mi Fit application in the battery settings.
• 📶 SIM-Map: Nano-SIM is needed with support 2G (GSM 850/900/1800/1900 MTS, Beeline and Tele2 They do, but Yota does not. 2G-activate the card in advance!
• 🔋 Charging: The watch must be charged at least 30%.When charged low, it can automatically shut down during setup.

Pay special attention SIM-Many parents insert the first card they see from an old phone, and then wonder why the watch doesn't ring:

⚠️ Attention: If SIM-The card was issued after 2022, it may not support the 2G (Check with your mobile operator on 0880 (for MTS) or 0611 (for Beeline).

Also prepare:

• 📎 Paperclip or needle to remove tray SIM-Cards (comprised but often lost).
• 🔑 Login and password from your Mi-account (if you forget - restore in advance on account.xiaomi.com).
• 📡 Stable Wi-Fi (for downloading firmware if the watch requires an update).

2. First activation and tethering to the phone: step-by-step instructions

Press and hold the power button on the right side of the watch for 3 seconds until the Mi Bunny logo appears.

1. Language selection: scroll the wheel at the bottom of the screen to Russian and press the confirmation button.
2. Connect to your phone: Download the Mi Fit (Android) or Mi Fit for Mi Bunny (iOS) app. Sign up or log in to your Mi-account. → Children's watches → Mi Bunny 4C.

Scan. QR-code

If QR-code is not readable:

• 🔦 Increase the brightness of the watch screen to maximum (in the display settings).
• 📱 Turn off the power saving mode in the phone - it can block the camera.
• 🔄 Reset the clock (hold the power button for 10 seconds) and try again.

After a successful scan, the watch will request permission:

If at the binding stage there is an error "Can not connect to the device", try:

Turn off Bluetooth on your phone and turn it back on|

Remove the watch from the device list in Mi Fit and start again|

Check that the phone is on Wi-Fi (even if the connection is on Bluetooth)|

Update the Mi Fit app to the latest version-->

3.Tune in. SIM-Calls and cards: Why the phone is not working

The most common problem with Xiaomi 4C — The clock does not ring or receive calls, although SIM-Map inserted. Causes and solutions:

• 🚫 No network. 2G: check the coverage of the operator in your region on the site coveragemap.ru. in some areas of Moscow and St. Petersburg 2G Disconnected – you will have to change the operator.
• 🔄 Inactive SIM: Even if the card is old, you need to re-activate it for the watch. USSD-team: *111*1# (for MTS or *105# (Beeline).
• 📵 Number lock: the default watch is "Whitelist." Add the parent numbers to the Mi Fit app → The device → Contact management.

To check the balance SIM-cardboards:

1. Click on the clock screen menu → Phone. →USSD.
2. Enter a command for your operator (see above).
3. If the answer doesn't come — SIM inactive or blocked.

If the calls are coming, but no SMS, cause:

• 📧 Centre SMS-Check the number with the operator and enter it manually through the USSD: *5005*767*+79991234567# (substitute +79991234567 to the actual center number).
• 🔒 In the settings of the clock disabled function "Reception" SMS". Include it in Settings. → Communications → Permission. SMS.

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If your child complains that the clock is not ringing, check the Do Not Disturb mode in the settings. It can automatically turn on in school (if School Mode is set).

4. GPS Geolocation: How to accurately track a child

Xiaomi Watches 4C Determine location in three ways:

1. GPS (It is the most accurate, but it only works on the street).
2. LBS (Cellular towers, less accurate).
3. Wi-Fi (if the watch is connected to a known network)

All three methods are included by default, but often GPS It's not catching satellites:

• 🛰️ Update. AGPS-Data: in the Mi Fit app go to the Device → Settings GPS → Update AGPS. This will speed up the search for satellites.
• 📡 Go outside: indoors GPS For the test, go out into the open space (park, yard) and wait 2-3 minutes.
• ⚙️ Set up the refresh interval: by default, the clock sends coordinates every 10 minutes.Change that to Mi Fit → geozones → Frequency of update.

If the clock shows a location with a 500 error+ meters:

⚠️ Note: In densely populated areas (for example, in the center of Moscow) LBS It can be up to 1 km in error because of the large number of towers. LBS customized GPS, leave only GPS + Wi-Fi.

To improve accuracy:

5. Parental Controls: Limitations and Hidden Functions

The main advantage of Xiaomi 4C — So this is what you can do with the flexibility of your parents:

The hidden function that doesn't go into the manual is "Exam Mode," which completely locks the clock for a given time (e.g., during a test time).

1. In the Mi Fit app, go to the Device → Additionally. → Examination regimen.
2. Set a lock time (maximum 4 hours).
3. Enter the password (by default 123456, but better change).

If a child complains that the watch is "glutching" and does not allow to call:

• 🔐 Check if the "only" mode is on. SOS" (safety-setting).
• 📴 Make sure that the balance is SIM-cards are not zero (even with a positive balance, some operators block outgoing cards).
• 🔄 Restart the clock – sometimes helps when the communication module freezes.

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All parental controls are synced only when you have an active Bluetooth connection. If you change something in Mi Fit but your watch doesn't respond, bring it closer to your phone (up to 10 meters away).

6. firmware update: how not to break the clock

Xiaomi firmware 4C It's automatically updated, but sometimes you need to manually update it, and the danger is that if you make a mistake, the watch can turn into a brick:

• 🔋 Battery charge of at least 50% (when discharged during the update, the clock will turn off).
• 📶 Stable Wi-Fi (not mobile internet!).
• ⏳ Do not interrupt the process (even if the clock is long hung by 99%).

How to manually update:

1. In the Mi Fit app, go to Profile → My devices. → Mi Bunny 4C → Update of the PO.
2. If the update is not, download the firmware from the official website en.miui.com/a/4c (Choose a version for your model!).
3. Transfer the.zip file to the root folder of the watch via Bluetooth (use the file manager in Mi Fit).
4. In the hours, go to Settings. → System system → Update → Local Update and Select a File.

If the clock does not turn on after the update:

⚠️ Attention: Don't panic -- 90 percent of the time, reset helps. Hold the power button for 20 seconds until the logo comes up. If it doesn't work, plug the watch into charging for 1 hour, then try again. Don't take apart the watch -- it'll take away your warranty!

Following a successful update:

• 🔄 Reset the settings to factory (Settings) → System system → Reset).
• 📱 Re-attach the clock to the phone.
• 🔒 Check the work. GPS call.

7 Problems and Errors: What to Do When the Watch Fails to Work

We have collected the most common mistakes and their solutions:

If the clock is not synchronized with the phone:

• 📱 Remove the watch from the device list in Mi Fit and re-attach.
• 🔄 Restart your phone and watch.
• 📡 Check that the phone is on Bluetooth and Wi-Fi.

If the screen stops working after the fall:

• 🔍 Light up with a flashlight - if the image is barely visible, the problem is in the backlight.
• 🛠️ If the screen is cracked, but the clock is working, replace the glass (cost) ~1500–2000 ₽).
• 🚫 Do not try to disassemble the watch yourself - the display is connected by a plume, which is easily damaged.

8.Alternative firmware and hacking: is it worth the risk

Some users are trying to install custom firmware on Xiaomi 4C, To unlock additional features (e.g. installing third-party apps) we do not recommend doing this for three reasons:

• 🔐 Loss of warranty: Any interference with the software will void the warranty Xiaomi.
• 🐛 Unstable operation: alternative firmware is often glitzy, especially with GPS and call.
• 🔒 Security risk: Third-party firmware may contain tracking vulnerabilities.

If you lack the functionality of standard firmware, consider these legal ways:

• 🔄 Update to the latest version (sometimes add new features).
• 📱 Use additional Mi Fit-compatible apps (e.g. Mi Home for Smart Home).
• 🛒 Buy a strap with NFC (for contactless payment in the school canteen).

If you still decided to custom firmware:

⚠️ Warning: First, create a backup of the original firmware through the Mi Flash Tool. Use only firmware from trusted forums (for example, use the firmware from the trusted forums, 4pda.ru). Please note that after the firmware may stop working:

• GPS;
• button SOS;
• synchronization with Mi Fit.

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Official updates for Xiaomi 4C Check the forum reviews before installing them – sometimes new versions contain critical bugs (for example, 1.4.7 firmware had a time-reflection error).

FAQ: Answers to Frequent Questions