How to activate USB-Modem on Xiaomi Redmi Note 9 Pro: the distribution of Internet from phone to PC

Modem modem through USB On the Xiaomi Redmi Note 9 Pro, you can distribute mobile internet to your computer or laptop without using Wi-Fi or Bluetooth, which is especially useful in situations where you need a stable connection with minimal battery consumption. However, many users face problems when they first turn on the feature: the phone is not defined as a modem, drivers are not installed, or the connection is permanently broken.

In this article, we will discuss all stages of adjustment. USB-modem on Redmi Note 9 Pro (models) M2003J6A1G, M2003J6B1G, M2003J6C1G), including the verification of compatibility with MIUI different versions, installing drivers on Windows/Linux/macOS And we'll focus on optimizing data speed and saving traffic.

1.Phone preparation: compatibility check and presettings

Before you connect Redmi Note 9 Pro as a USB-modem, make sure your phone supports this feature. MIUI 12, 13 and 14 modem modem is available by default, but additional actions may be required to work steadily:

• 📱 Update the firmware: go to Settings → The phone. → Update MIUI And install the latest version. In the old builds (below). MIUI 12.0.3) possible bugs with USB-modem.
• 🔌 Check it out. USB-Cable: Use original cable or certified cable USB Type-C with data support (not all charging cables are suitable!).
• 🔒 Unlock the bootloader (if necessary): if the phone has previously been modified (castom firmware, root), modem mode can be turned off in the developer settings.

Also make sure that your mobile operator tariff allows data transfer via modem (tethering).Some operators (such as Tele2 or Iota) block this feature or charge an additional fee.

1. Open the operator’s application (for example, My MTS or My Beeline).
2. Go to the "Tariff" or "Services" section.
3. Find information about "internet distribution" or "modem mode".

⚠️ Note: For some corporate rates (e.g. MegaFon Business), modem mode may be disabled by the network administrator.

2. Step-by-step instruction: how to turn on USB-modem on Redmi Note 9 Pro

The modem modem activation algorithm is the same for all versions. MIUI, But it may vary slightly depending on the shell:

1. Connect your phone to your computer through USB-On your phone screen, select File Transfer Mode (MTP) (It's temporary, we'll change it later).
2. Open Settings → Network and Internet → Access Point and modem.
3. Activate the switch. USB-If you don't have an option, tap the three dots in the top right corner and select Additional Settings.
4. A notification will appear on the screen. USB-The modem is active. You can change the mode now. USB-plug-in USB-modem (RNDIS).

If after switching on modem mode the Internet on the computer did not appear, perform additional actions:

• 🔄 Reboot your phone and reconnect.
• 🖥️ Check PC network settings: on Windows, open the Control Panel → Networks and the Internet → Change the adapter settings and make sure a new Remote connection is available NDIS.
• 🛠️ Update the driver: if the device is displayed with an exclamation mark, download the drivers from the official Xiaomi website (section "Drivers").

USB-The modem is enabled in the phone settings

A new network connection has been added to the PC (Remote). NDIS ethernet)

In the Windows tray, the Internet connection icon is displayed

Data transfer speed in Task Manager (Installation "Performance") > 0 Kb/s

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Installation of drivers for USB-multi-operator

Without the right drivers, the computer won't recognize the Redmi Note 9 Pro as a modem, so let's look at the process for three popular operating systems.

Windows 10/11

On most Windows PCs, drivers are installed automatically through Windows Update, but sometimes manual installation is required:

1. Download the archive with drivers for Xiaomi at the link (official source).
2. Connect your phone in modem mode and wait for the device with a yellow exclamation point to appear in Device Manager.
3. Right-click on the device → Update the driver → Search for drivers on this computer and specify the path to the downloaded file.

macOS (Catalina and newer)

On a Mac, drivers for USB-Redmi Note 9 Pro modems are set automatically, but additional setup may be required:

sudo networksetup -setdhcp "USB 10/100/1000 LAN"

This command will enable automatic receipt IP-If the Internet is not available, check the settings of the firewall in System settings → Protection and security.

Linux (Ubuntu/Debian)

On Linux systems, it is usually enough to connect the phone - the kernel will automatically boot the module. rndis_host. If the connection is not working:

sudo modprobe rndis_host


sudo dhclient -v usb0

For continuous operation, add the module to the autoload:

echo "rndis_host" | sudo tee -a /etc/modules

⚠️ Attention: On Windows 7 USB-Redmi Note 9 Pro modem may not work due to lack of support RNDIS 6.0+. Solution: Upgrade to Windows 10 or use a Wi-Fi hotspot.

Windows 10/11|macOS|Linux|Windows 7/8|Another.-->

4. Solving common problems with USB-modem

Even after you set it up correctly, Redmi Note 9 Pro users are faced with common errors, and we will discuss the most common cases and ways to fix them.

Problem 1: Computers don’t see a phone as a modem

If after connection in the Device Manager appears unknown device (Other devices) → MTP), execute:

• 🔄 Switch the mode. USB on the phone: Charging → File transfer → USB-modem.
• 🔌 Try another one. USB-port (preferably) USB 3.0 blue).
• 🛠️ Remove all Xiaomi devices in Device Manager and reconnect your phone.

Problem 2: Connection is available, but the Internet is not working

The reasons can be different – from the lock operator to the conflict. IP-Check the addresses:

• 📶 Signal level of the mobile network on the phone (must be at least) 2-3 division).
• 🔒 Settings APN: Go to Settings. → SIM-maps and mobile networks → Access point (APN) Compare the parameters with your operator’s recommendations.
• 🖥️ On PC: Open the command line and execute: ping 8.8.8.8 If the ping passes, but the sites do not open – the problem is DNS. Enter: ipconfig /flushdns

Problem 3: Low data transfer speed

Redmi Note 9 Pro has the highest speed USB-modem limited to 150 Mbps (USB 2.0, even if the phone supports 4G LTE-A (Up to 600 Mbps to improve speed:

• 📶 Switch to the network. 4G (LTE) customized SIM-map.
• 🔌 Use the short one. USB-cable (up to 1 meter) without damage.
• 🖥️ Disable other network connections on PC (Wi-Fi, Ethernet).

5. Optimization of traffic and battery consumption

USB-The modem uses less power than Wi-Fi or Bluetooth, but with prolonged use, the battery drain is still noticeable:

• 🔋 Connect your phone to charge: even if the battery level is high, the constant data transfer drains the battery. 33W kitty.
• 📊 Limit background traffic: on your PC, turn off automatic software updates (Windows Store, Steam, uTorrent). → The Internet and the Internet → Transfer of data → Saving traffic.
• ⏳ Set up timeout: If the modem is used periodically, turn it off via Settings → Battery → Sleep mode (select "Switch off mobile Internet after 10 minutes of inactivity").

To monitor traffic, install GlassWire (Windows) or Internet Speed Meter (Android) to show which programs consume the most data.

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If you use it often USB-Modem, disable automatic update MIUI This will save up to 30% of traffic when connecting to a PC.

6. Alternative ways to distribute the Internet with Redmi Note 9 Pro

If USB-The modem is not working or is not suitable for your task, consider alternative options:

Wi-Fi access point

Higher speed, but faster battery drain.

1. Go to Settings → Network and Internet → Access Point and modem.
2. Select Wi-Fi Access Point and set up a network name/password.
3. Activate the switch. Maximum number of connected devices is 8.

Bluetooth modem

Saves battery power, but speed is limited ~3 Mbps is suitable for small data volumes (mail, instant messengers:

1. Turn on Bluetooth on your phone and PC.
2. Connect devices (password is usually 0000 or 1234).
3. In the phone modem settings, activate the Bluetooth modem.

USB-cable + PDANet (to bypass operator locks)

If the operator blocks the standard Internet distribution, use the PDANet application.+:

• Download. APK from the official website and install on the phone.
• Connect your phone to your PC and run PDANet on both devices.
• Select a mode. USB Tether (does not require root rights).

⚠️ Note: Applications like PDANet may violate the terms of use of some carriers.

💡

USB-The modem is the most stable and economical way to distribute the Internet with the Redmi Note 9 Pro, but requires the correct setting of drivers and checking the operator’s restrictions.

7. Safety in the use of USB-modem

Connecting your phone to your computer in modem mode opens up potential vulnerabilities for attackers.

• 🔒 Turn off the debugging. USB: Go to Settings. → The phone. → Version. MIUI (tap 7 times to activate the developer mode, then to Settings → Additionally. → For developers and deactivate the debugging by USB.
• 🛡️ Use antivirus: On your PC, install Kaspersky Internet Security or Bitdefender and scan the system for viruses before connecting your phone.
• 🔑 Set up the lock. SIM-maps: in Settings → SIM-maps and mobile networks → Lockdown SIM-set up the cards PIN-code to prevent unauthorized use of traffic.

If you connect your phone to a public computer (such as an internet cafe or library), turn on Charging Only in the settings. USB and use VPN (For example, ProtonVPN or Windscribe for encrypting traffic.

FAQ: Frequent questions about USB-modem on Redmi Note 9 Pro