In modern conditions, a smartphone has long ceased to be just a means of communication, having turned into a universal communication tool and an access point to the global network. Situations when a desktop computer or laptop remains without access to Wi-Fi, but the 4G or 5G mobile network works stably, arise quite often. Owners of Xiaomi devices are faced with the need to quickly organize traffic distribution, and the most reliable way in such cases is a wired connection.
Using a USB cable to transfer an Internet connection from an Android smartphone to a PC has a number of undeniable advantages over a wireless access point. Firstly, there are minimal delays (ping) and higher channel stability, which is critical for online games or video conferencing. Secondly, wired connection does not drain the phone's battery as quickly as Wi-Fi distribution, since the device simultaneously receives power from the computer port. In this article, we will analyze in detail the process of setting up the USB modem mode on Xiaomi and Redmi smartphones.
Advantages of a wired connection and requirements
Before starting the setup, it is worth understanding why the cable method is often preferable. A wireless Wi-Fi network is subject to interference from other devices, walls, and distance, while a physical connection allows for direct data transfer. For users who value speed and lack of tearing USB modem is the optimal choice. In addition, the RNDIS protocol used in Android allows the computer to perceive the phone as a regular network card.
However, for the successful implementation of the plan, certain technical conditions must be met. Not every cable is suitable for data transfer: many supplied cords are designed solely for charging and do not have internal lines for transmitting information. You will need a high-quality cable with marking Data or an original accessory from Xiaomi. Also make sure that mobile data transfer is activated on the smartphone itself, since you can only distribute the Internet that is already on the device.
It is important to note that the computer operating system must automatically recognize the new network device. In Windows 10 and 11, this process is usually seamless, but in older versions such as Windows 7, manual installation of drivers may be required. Xiaomi owners should take into account the features of the MIUI or HyperOS shell, where some menu items may be hidden or named differently than in pure Android.
⚠️ Attention: When actively using modem mode, the smartphone may become noticeably warm. This is a normal physical reaction of the processor and modem to high load. It is recommended to remove the case if it is tight and not cover the device during operation.
Preparing equipment and checking the cable
The first step towards a stable Internet is a physical connection. Take a USB cable and connect your Xiaomi smartphone to your computer. Pay attention to the reaction of the phone screen: if a message appears about charging, this is a good sign, but it is not enough. You need to make sure that the system sees the device not only as a source of energy, but also as a peripheral gadget.
Owners of old cables often encounter the fact that the computer makes a sound when the device is connected, but nothing appears in the list of network adapters. In 90% of cases, the problem lies precisely in a damaged or poor-quality cord. Try replacing the cable with a known good one, preferably the original one that came with the phone or was purchased at an authorized store. The length of the cable also matters: cords that are too long (more than 2 meters) can cause a voltage drop and an unstable connection.
After the physical connection, proceed to check the settings on the smartphone itself. Go to Settings and find the section responsible for connections. Depending on the MIUI firmware version, this item may be called “Connection and sharing” or located in the advanced settings menu. Make sure that the switch mobile data is in the active position.
☑️ Checking readiness for connection
Activation of USB modem mode in MIUI
The Xiaomi shell interface may differ slightly in different versions, but the logic for finding the desired function remains the same. Once the cable is connected, you need to find the switch that activates modem mode. Usually it is hidden in the settings menu for SIM cards and mobile networks or in the additional functions section.
The action algorithm is as follows: open Settings, then go to Connection and sharing. If you don’t find this item right away, use the settings search by entering the phrase “modem”. In the menu that opens, you will see several distribution options: Wi-Fi access point, Bluetooth modem and USB modem. Since the cable is already connected, the item USB modem should become active for clicking.
If the USB modem item is highlighted in gray and does not respond to presses, this means that the phone does not see the physical connection to the computer. In this case, try switching the USB operating mode in the developer menu or simply reconnecting the cable to a different port. Some Redmi models require additional confirmation of trust in the computer, which appears in a pop-up window on the screen of an unlocked smartphone.
What to do if the “USB modem” item is not in the menu?
Sometimes this item may be hidden in stripped-down firmware versions or on specific regional builds. Try enabling USB debugging in the Developer Options menu, then reboot your device. Also check if the Charge Only mode is activated in the curtain notifications.
Once you activate the switch, an icon resembling two connected links or a USB symbol will appear in the phone's status bar. This indicates that modem mode has been launched and the phone has begun to broadcast a network packet to the connected device.
Setting up a network adapter on the computer
After activating the function on the phone, the computer's operating system should automatically detect new equipment. A new network adapter will appear in Windows Device Manager, often called the “Remote NDIS based Internet Sharing Device”. The system will automatically install the necessary drivers, and after a few seconds the wired connection icon will appear in the tray.
In rare cases, especially on older builds of Windows, the automatic installation may not work. Then you will have to manually tell the system the device type. Go to Device Manager, find the unknown device with a yellow exclamation mark, right-click and select Update Drivers. Select automatic search, and the system will pull up the standard Microsoft drivers required to work with Android devices.
It is worth noting the difference in the behavior of different operating systems. While the process is usually transparent on Windows, Linux or macOS users may require additional configuration. On macOS, for example, the phone will be detected as a network interface, but you may need to create a new network profile in system settings. In Linux distributions, installation of the package is often required android-tools for the correct operation of the RNDIS protocol.
| Characteristics | USB modem | Wi-Fi access point | Bluetooth modem |
|---|---|---|---|
| Transmission speed | High (up to 400 Mbit/s) | Medium (depending on the Wi-Fi standard) | Low (up to 2-3 Mbit/s) |
| Stability | Maximum | Average (affected by interference) | Low |
| Latency (Ping) | Minimum | Average | High |
| Battery consumption | Low (charging) | High | Average |
If the computer sees the phone, but the Internet does not work, try disabling and enabling airplane mode on the smartphone. This will restart the communication module and update the IP address with the operator.
Diagnosing problems and troubleshooting
Despite the simplicity of the procedure, users sometimes encounter situations where the connection is established, but the pages in the browser do not load. The first reason may be blocking by the telecom operator. Some tariff plans prohibit sharing the Internet to other devices or require a separate fee for this service. In this case, the speed may be artificially limited to 64 or 128 Kbps, which makes browsing impossible.
The second common problem is an IP address conflict or errors in the DNS settings. If the network icon is on, but there is no access, try registering public DNS servers manually in the network adapter settings on your computer. Addresses from Google (8.8.8.8) or Cloudflare (1.1.1.1) often help. This allows you to bypass possible errors in the routing of the provider's traffic.
It is also worth checking the firewall and antivirus settings on your PC. Sometimes security software blocks new network connections, considering them suspicious. Temporarily disable the firewall to test the hypothesis. If the Internet appears after this, add the phone network to the exceptions of your antivirus.
⚠️ Attention: Telecom operators can track the TTL (Time To Live) of packets. When the Internet is distributed, this parameter changes, which allows the provider to detect the fact that the phone is being used as a modem. Be careful when choosing a tariff plan.
Security and traffic optimization
Using a smartphone as a modem imposes a certain responsibility for the traffic consumed. Computers, unlike phones, often perform background system updates, download torrents, or synchronize cloud storage. These processes can quietly “eat up” your entire monthly limit in a few hours. It is recommended to temporarily disable automatic Windows updates and background apps before connecting.
From a security perspective, a wired connection is more secure than public Wi-Fi because data is transferred over a physical cable and is not intercepted over the air. However, it is worth remembering that all traffic passes through the mobile operator’s network. When visiting sensitive resources, use HTTPS and, if necessary, VPN services, although this may further reduce connection speed.
To optimize performance, you can limit the background activity of applications on the computer itself. In Task Manager, sort processes by network usage and end those that are not needed at the moment. This will help direct all available channel to solving your current tasks, be it work or entertainment.
A wired connection via USB provides better speed and stability compared to Wi-Fi, but requires monitoring the computer's background traffic so as not to exhaust the mobile operator's limit.
Frequently asked questions (FAQ)
Why does the computer not see the Xiaomi phone when connected?
Most often the problem is in the cable, which only supports charging. Replace the cord with a high-quality analogue that supports data transfer. Also check if the phone's screen is unlocked and if USB debugging is enabled in the advanced settings.
Is it possible to share the Internet if Wi-Fi is turned on on the phone?
On most modern Xiaomi smartphones with updated MIUI firmware, this function is available. You can receive the Internet via Wi-Fi and distribute it via USB. However, in older versions of Android, when modem mode is turned on, Wi-Fi on the phone may turn off.
Does modem mode affect the speed of mobile data?
Connecting a cable in itself does not reduce the speed, but the load on the phone’s processor increases. If the phone overheats, the system may force the modem to lower its frequencies, resulting in a drop in speed. Ensure good cooling of the device.
How to disable USB modem mode?
Simply disconnect the USB cable from your computer or phone. You can also go to settings Connection and sharing and manually set the switch USB modem to the inactive state.