How to turn it on USB-modem on Xiaomi Redmi 7A: ferret USB-cable

Xiaomi Redmi 7A It's still a popular budget smartphone, despite the release of new models, and one of its hidden features is the ability to distribute mobile Internet over the Internet. USB-modem, which is especially useful when Wi-Fi is not available or you need a stable wired connection, USB-The modem saves battery power and provides a higher data transfer rate.

However, many users have problems when trying to activate this feature: drivers are not installed, the computer does not recognize the device, the speed leaves much to be desired. USB-modem on Redmi 7A — From basic actions to solving rare errors, and also give tips on optimizing the connection. MIUI and features of working on Windows 10/11 Linux.

What is it? USB-Modem and why you need it on Redmi 7A

USB-modem USB-Tetring is a mode in which the smartphone transmits mobile Internet to a computer or laptop through USB-Unlike Wi-Fi hotspots, this is a method:

• 🔋 Saves battery power – the phone does not waste energy on maintaining a wireless network.
• 🚀 Speeds up – wired connections are more stable and faster, especially in low signal conditions.
• 🔒 More secure – data is transmitted over an encrypted channel, unlike open Wi-Fi networks.
• 💻 Universal – works even on a PC without a Wi-Fi adapter.

On the Redmi. 7A This feature is implemented at the level of Android 9 Pie (the original firmware of the device), but its work depends on several factors:

• 📱 Version. MIUI — In older assemblies (below 10.2), there may be no driver for USB-modem.
• 🖥️ PC operating system - Windows 10/11 Usually installs drivers automatically, and Linux may require manual configuration.
• 📶 Operator's tariff - some mobile operators block USB-Tetring (for example, “Tele2” or “Yota” in basic rates).

It is important that you use Redmi. 7A With custom firmware (such as LineageOS or Pixel Experience), the setup process may be different. RNDIS via Magisk.

Preparation of the smartphone: compatibility check and updates

Before inclusion USB-Make sure your modem is your Redmi. 7A Missing this step often leads to errors like "Device not recognized" or no option in settings.

Step 1. Check the version. MIUI

USB-The modem is stable and works MIUI 10.2 and above to find out your version:

1. Open the Settings. → The phone.
2. Scroll down to the MIUI version.
3. If version is below 10.2, update the firmware through Settings → Updating the system.

Step 2: Make sure that the mobile internet is active

USB-The modem only transmits traffic that the smartphone itself receives:

• 📶 Is the mobile internet on in the notification curtain.
• 🌐 Whether websites are opened in a browser (for example, m.xiaomi.com).
• 📱 Is there a “No Connection” icon in the status bar.

Step 3. Use the original USB-cable

Redmi 7A It's sensitive to cable quality, and cheap, uncertified wires don't have to transmit data, they just charge the device:

• ⚡ The phone is charging, but the computer can’t see it.
• 🔌 A notification is given “Charging through” USB» instead of “Data transfers».
• 🖥️ Windows Device Manager displays “Unknown Device».

Update MIUI before 10.2 or newer|Check the mobile Internet|Use the original USB-cable|Shut down. VPN/proxy (if any)-->

Step-by-step instruction: how to turn on USB-modem 7A

Now, to the basic process, follow the instructions carefully, because even one step can fail.

Step 1: Connect your smartphone to your computer

Use the cable that came with Redmi. 7A. Put him on the hook. USB-port on PC (preferably) USB 3.0 for maximum speed. On your phone, select File Transfer Mode (MTP) plug-in.

Step 2. Activate modem modem

Open your smartphone settings and follow the following steps:

1. Go to Settings. → Access Point and modem.
2. Tap on point. USB-modem.
3. Turn the switch on to the "On" position.
4. Confirm the action if a request for permission appears.

After that, an icon should appear in the status bar of the phone. USB two-handed.

Step 3: Set up your computer (for Windows)

On a Windows PC 10/11 Drivers are usually installed automatically, but sometimes manual adjustment is required:

1. Open the control panel. → Device Manager.
2. Find the Network Adapters in the List → Remote NDIS based Internet Sharing Device.
3. If the device is marked with a yellow exclamation mark, right-click on it and select Update driver → Automatic search.

Step 4. Check the connection.

On the computer:

• Open Network Connections (via Control Panel or Search).
• Make sure you have a new connection called Ethernet or Remote. NDIS.
• Launch your browser and check your internet access.

Addressing common problems with USB-modem

Even with the right setup, Redmi users 7A Sometimes we have to deal with mistakes. Let's look at the most common ones and how to fix them.

Problem 1: Computer cannot see phone in modem modem

Causes and solutions:

Problem 2: Low Internet speeds through the Internet USB-modem

If the speed is lower than when connecting directly to a mobile network, try:

• 📶 Switch to the network 4G — in the settings of the Mobile Network → Type of network, select 4G (LTE).
• 🔄 Change. APN — Sometimes operators limit the speed of the standard APN. Check the correct settings on your operator’s website.
• 🖥️ Disable background programs – torrents, cloud syncs and Windows updates can eat up traffic.
• 🔌 Use the port USB 3.0 – It provides higher bandwidth.

Problem 3: USB-The modem shuts down on its own

If the connection breaks after a few minutes, the power saving settings are to blame:

• On the Redmi. 7A: Go to Settings. → Battery and performance. Select Battery Consumption Management by Apps. Find USB-modem and disable optimization.

1. Open the control panel. → Power supply.
2. Choose the High Performance scheme.
3. In additional settings, disable the Temporary Shutdown USB-port.

For Beeline and MegaFon, you can find similar settings on their official websites. APN restart the phone.

2.Use of DNS from Google or Cloudflare

By default, Redmi. 7A use DNS operator that could be overloaded to change them:

1. On the computer, open network connections.
2. Right-click on the Ethernet connection (Remote) NDIS) → Properties.
3. Select IP version 4 (TCP/IPv4) → Properties.
4. Indicate. DNS: Google: 8.8.8.8 and 8.8.4.4 Cloudflare: 1.1.1.1 and 1.0.0.1

3. Disabling background processes on the phone

On the Redmi. 7A With 2GB of RAM, background apps can “steal” traffic and reduce speed USB-modem, to avoid it:

• Close all applications through recent tasks.
• Turn off auto-update apps in the Play Market.
• In Battery settings, limit background activity for unnecessary applications.

4. Speed check and diagnostics

To estimate the real speed USB-modem, use the services:

• 📊 Speedtest.net – to check the download/return speed.
• 📶 DSLReports – for ping analysis and stability.

If the speed is below 10 Mbps with a good signal 4G, problem:

• The overloaded operator tower (try it later).
• Fare limits (check the traffic limit).
• Faulty modem phone (less often).

USB-modem 7A custom-made

If you use an informal firmware (e.g. LineageOS, Havoc-OS or Pixel Experience), USB-The modem may not work out of the box. RNDIS core.

Decision 1: Installation of the module RNDIS via Magisk

For this:

1. Install Magisk Manager from the official repository.
2. Download the module. RNDIS Tethering Fix.
3. Install the module via Magisk and restart the phone.

Decision 2: Manual activation RNDIS through ADB

If Magisk doesn’t work, try activating it. RNDIS manually:

adb shell


su




setprop sys.usb.config rndis,adb

Then reconnect the cable and check for the option. USB-modem.

Decision 3: Official firmware MIUI

If nothing helps, go back to the stock firmware:

1. Download the latest version MIUI for Redmi 7A official website.
2. Install the Mi Flash Tool and flash your phone in Fastboot mode.

💡

On custom firmware. USB-The modem often requires additional customization. If you are not an experienced user, it is recommended to return to the official MIUI tetring-proof.

Safety in use USB-modem

USB-The modem is convenient, but it has risks that few people think about:

1. Vulnerabilities when connecting to someone else's PC

When you connect Redmi 7A When the computer is in modem mode, it becomes vulnerable to:

• 🖥️ Data breaches - through ADB or MTP You can copy files without your knowledge.
• 🔧 Malware installations – if there are viruses on the PC, they can get into the phone.
• 🕵️ Traffic interception – in public networks (such as in an internet cafe) your traffic may be tapped.

2. How to defend yourself

Follow these rules:

• 🔒 Turn it off. USB-Debugging if you do not use it (Settings) → For developers).
• 🛡️ Use VPN (e.g. ProtonVPN or Windscribe) to encrypt traffic.
• 🚫 Do not connect to other people's PCs in file transfer mode - choose only USB-modem.
• 🔄 Update regularly MIUI — In new versions, vulnerabilities are closed.

Restrictions of operators

Some operators are blocking USB-Tetring or speed limits, for example:

• Tele2 - in the tariffs of "My Tele2" tetring is limited to 64 Kbps.
• Iota - in base fare USB-The modem only works after paying for an additional option.
• MTS and Beeline are not usually blocked, but they can reduce the priority of traffic.

To circumvent the restrictions, you can use VPN computer-switch APN (See the section on optimization).

💡

If the operator is blocking USB-modem, try connecting via Bluetooth tetring (Settings) → Access Point and modem → Bluetooth modem: This method is less likely to be blocked, although the speed will be lower.

FAQ: Answers to Frequent Questions about USB-modem on Redmi 7A