Bluetooth modem on Xiaomi smartphones is a little-known, but extremely useful feature that allows you to distribute the Internet from your phone to other devices without using Wi-Fi or other devices. USB-Unlike the classic hotspot mode, the Bluetooth modem saves battery power, is more stable in the face of interference and does not require passwords. MIUI This option is often hidden or called unobvious.
In this article, we will discuss all the stages of working with a Bluetooth modem: from activation to speed optimization and solving typical problems. POCO Android 10–14 based, including MIUI We will pay special attention to hidden settings that allow you to increase the data transfer speed to 2-3 Mbit / s (versus the standard 0.5-1 Mbit / s).
What is a Bluetooth modem and why is it needed?
Bluetooth modem (or Bluetooth tethering) is a technology where your Xiaomi smartphone distributes mobile Internet to other gadgets via a Bluetooth connection. Unlike a Wi-Fi hotspot, there is no limit on the number of connected devices (usually 1-2, but more stable than one), and power consumption is lower by 30-40%.
- 📱 Connecting a tablet or laptop to the Internet when Wi-Fi is not available, and USB-cable.
- 🎧 Use of smartwatches (Mi Band, Amazfit) with network access for notifications.
- 🚗 Synchronize data with a car radio that supports only Bluetooth.
- 🖥️ Backup network access for PCs if the main connection is missing.
The main disadvantage is limited speed (usually up to 1-2 Mbps versus 10-50 Mbps for Wi-Fi), but for instant messengers, mail or navigation, this is enough, and Xiaomi hides options in the engineering menu to increase it (for this, see the optimization section).
⚠️ Attention: On some firmware MIUI (especially global) Bluetooth modem function can be disabled by default. If it is not in the settings, you will need to activate via Settings → The phone. → Version. MIUI (5 times tap to unlock the developer mode).
How to enable Bluetooth modem on Xiaomi: step-by-step instructions
The activation algorithm depends on the version MIUI, But the general pattern is the same:
- Open the Settings. → Connections and sharing → Modem mode (or Personal Access Point on older versions).
- Activate the Bluetooth modem slider (could be called Bluetooth tethering).
- On a device that needs internet, turn on Bluetooth and find your Xiaomi in the list of available devices.
- Confirm pairing on both gadgets. After connecting in the status bar Xiaomi will appear Bluetooth icon with arrows (traffic distribution icon).
If the Bluetooth modem is not on the menu:
Update the firmware to the latest version MIUI|Activate the developer mode (tap 5 times according to version) MIUI)|Set an alternative settings menu through ADB|Check your regional settings (some features are hidden in Chinese firmware)-->
Nana POCO F5, Redmi Note 12 and new models may be different: → SIM-maps and mobile networks → Access Point and modem → Bluetooth modem. If you don't, search by settings (top magnifier icon).
Configuring a connected device (PC, laptop, tablet)
After activating the modem on Xiaomi, you need to properly configure the gadget that will receive the Internet.
🖥️ Connecting to Windows 10/11
- Open Settings → Devices → Bluetooth and other devices.
- Find your Xiaomi in the list and click Connect.
- After pairing, go to the Control Panel → Network and Internet → Network control centre.
- Select Change Adapter Settings, find Bluetooth Connection, and enable Shared Internet Connection.
📱 Connecting to an Android tablet or other smartphone
- 🔗 Turn on Bluetooth on your tablet and find Xiaomi in the list of devices.
- 🔄 After pairing, go to Settings → Network and Internet → Access Point and modem.
- 📶 Activate the Bluetooth modem option (on some devices it appears automatically).
🚗 Connection to a car tape recorder
Most modern radios (Pioneer, Sony, Xiaomi) 70mai) It supports the Bluetooth Internet:
- In the radio menu, select Settings. → Bluetooth → Connect the phone.
- After pairing, find the Internet or Tethering section and activate data acquisition.
- If you don’t have an option, check if your model supports Bluetooth. DUN (Dial-Up Networking).
⚠️ Note: On some car headsets (e.g. Android Auto), the Bluetooth Internet may conflict with the audio stream. In this case, turn off music streaming via Bluetooth in Xiaomi settings (Settings) → Connected devices → [tape-signature] → Media-audio).
How to increase the speed of Bluetooth modem on Xiaomi
The standard speed of a Bluetooth modem rarely exceeds 1 Mbps, but it can be increased by 2-3 times using hidden settings.
🔧 Method 1: Change MTU (Maximum Transmission Unit)
MTU The optimal value for Bluetooth is 576 (instead of the standard 1500) to change it:
- Connect Xiaomi to the PC by USB and activate Debugging on USB (Settings → The phone. → Version. MIUI → 5 taps → Additionally. → For developers).
- On PC, open the command line and type: adb shell settings put global tether_dun_required 0 adb shell ifconfig bnep0 mtu 576
- Restart your phone and check the speed through Speedtest.
📡 Method 2: Switch to profile PAN (Personal Area Network)
Xiaomi is using the protocol by default DUN (Dial-Up Networking is slower than PAN. To change him:
- 🔄 Go to Settings. → Connected devices.
- 📋 Tap on the device that receives the Internet and select the Connection Type → PAN (If there is no option, use it. ADB:
🔋 Method 3: Optimization of energy consumption
MIUI Limits Bluetooth performance in power saving mode:
- Go to Settings → Battery and Performance → Performance Mode.
- Select High Performance (temporarily disables restrictions).
- Add the Settings app to the list No Limits (Settings) → Battery → Optimizing the battery).
| Method | Difficulty | Speed increase | Need root? |
|---|---|---|---|
| Change of change MTU | Medium | up to 2-3 Mbps | No. |
| Switch to PAN | Easy. | up to 1.5 Mbps | No. |
| Power-saving shutdown | Easy. | up to 0.5 Mbps | No. |
| Custom core firmware | Tall. | up to 5 Mbps | Yes. |
💡
If the speed has not increased after the changes, check if your carrier is blocking traffic, Tele2) limit the Bluetooth modem at the level SIM-The solution is to call support and ask to remove the restriction (service code: *111*123#).
Typical errors and their solution
Even after you set up the Bluetooth modem correctly, it can be unstable, and here are the most common problems and ways to fix them:
🚫 Mistake: “I was unable to connect to the Internet"
Causes and solutions:
- 📵 No mobile internet: Check balance and settings APN (Settings → SIM-map → Access point (APN)).
- 🔄 Profile conflict: Remove the device from the list of conjugates and connect again.
- 🛠️ Service failure: Restart Bluetooth via engineering menu: ##4636## → Phone information → Wi-Fi information → Menu (three dots) → Reset Bluetooth
⚡ Mistake: The battery is quickly running out
If the charge drops by 10-15% per hour:
- 🔋 Turn off Continuous Device Search (Settings) → Bluetooth → Additionally).
- ⚙️ Set background activity limits for system applications (Settings) → Annexes → Application management → Systemic → Limit background activity).
- 📉 Reduce the maximum transmission speed to 500 Kbit/s (through ADB): adb shell settings put global tether_dun_speed 500
🔌 Error: Connection is terminated after 5-10 minutes
The blame lies on the energy saving settings:
How to turn off the automatic disabling of Bluetooth modem
If the problem persists, check to see if your antivirus (such as Avast or Kaspersky) is blocking your connection.
Bluetooth modem vs Wi-Fi hotspot: Which is better?
Both of these methods of distributing the Internet have pros and cons, depending on your task.
| Criteria | Bluetooth modem | Wi-Fi hotspot |
|---|---|---|
| Speed. | 0.5–3 Mbps | 10–50 Mbps |
| Energy consumption | Low (3-5% per hour) | High (10-15% per hour) |
| Number of devices | 1–2 | 10. |
| Stability | High (no interference) | Medium (depending on the load of the air) |
| Security | High (conjugation required) | Medium (can be connected by password) |
When to choose a Bluetooth modem:
- 🔋 You need to save battery power (for example, on a trip).
- 📶 Wi-Fi signal weak or interference.
- 🚗 Connect a device without Wi-Fi (smart watch, old tape recorder).
When to choose a Wi-Fi hotspot:
- 🎮 High speed (video, games, download files).
- 👥 Connecting multiple devices at the same time.
- 📱 The device does not support Bluetooth Internet (rarely, but it happens).
💡
Bluetooth modem is the best choice for background synchronization (mail, messengers, navigation), and Wi-Fi hotspot for active use (streaming, games, downloading files).
Hidden chips of Bluetooth modem on Xiaomi
V MIUI There are a few undocumented features that make Bluetooth modem even more useful:
🔑 Automatic connection when pairing
To connect the device to the Internet immediately after pairing (without manually turning on the modem):
- Activate Developer Mode (as described above).
- Go to Settings → Additional → For developers.
- Find the auto-connect Bluetooth modem option and turn it on.
📊 Traffic monitoring
To track how much data is transmitted via Bluetooth:
- Install the NetGuard or GlassWire app.
- In the application settings, select Bluetooth Traffic Monitoring.
- Set up notifications when you exceed the limit (useful for Internet-limited fares).
🔄 Quick switching between Wi-Fi and Bluetooth modem
If you change the type of handout frequently, add a shortcut to the notification bar:
- Unwrap the notification curtain and tap on the icon ⚙️ (Edit).
- Find the modem modem tile and drag it to the active area.
- Now you can turn on/off Bluetooth modem with one tap.
💡
Xiaomi. 13/14 and POCO F5 There's a hidden function called Double-click on the back to turn on the modem. Activated via Settings. → Additionally. → Gestures → Double touch. → Select the modem modem action.