Using a smartphone as a multimedia hub has become standard, but not everyone knows that a wired connection is often more stable than a wireless one. USB-The cable allows you to stream video in high resolution without the latency of Wi-Fi, ideal for watching heavy movies or presenting photos in the highest quality.
Unlike Mi Drop or Chromecast, physical contact ensures no interruption. However, the setup process has its own nuances, depending on the version of Android and the type of connector on the TV. In this article, we will discuss all aspects of connection, from choosing a cable to setting up a debugging.
Before you start, it's important to understand that just inserting the cable is not enough. You'll need to adjust the operating mode. USB-And the right hardware is the key to synchronizing devices in minutes, and maybe activating the hidden developer functions.
Equipment and cable preparation required
The quality of the materials used is critical to a successful connection. Cheap cables are often just for charging and do not support data transfer, which is the most common cause of failure. You will need a USB Type-C cable with support for MHL or Alt Mode.
Also make sure your TV is equipped with a USB 3.0 port (usually blue) for better bandwidth.Although USB 2.0 connectivity is possible, file transfer speeds will be significantly lower, which can cause buffering when playing 4K video.
- 🔌 Cable USB Type-C to USB-A (It is also supported by data transfer, not just charging)
- 📺 TV with external drive reading or support MHL
- 📱 Xiaomi or Redmi smartphone with a serviceable charging connector
- 🎥 Transitioner USB-C to HDMI (optionally, for the mode of video output)
Check the integrity of the connectors on both devices. Dust or oxidation of the contacts can prevent the establishment of a stable connection.
⚠️ Note: Using damaged or too long cables (more than 2 meters) can cause voltage drops and the inability to detect the device by the TV.
Setup of Xiaomi smartphone for data transfer
When you connect to a computer or TV, the phone goes into Charge Only mode by default. To allow the TV to see the contents of the memory, you need to manually change this setting. Once the cable is connected, lower the notification curtain and click on the Charge Through Notification Notice. USB».
In the menu that opens, select File Transfer (MTP) mode.** This protocol allows the TV to recognize the internal memory of the smartphone as an external drive. In some MIUI models, this option may be called Photo Transfer (PTP) if the MTP does not work.
If the mode selection menu doesn’t appear, the Connection Notification feature may be disabled. Go to Settings → About Phone → MIUI version and quickly press 7 times to activate the developer mode. Then, in the advanced settings, find the “Default USB Configuration” option and set the desired value.
Importantly, some older TV models do not support the exFAT file system that is often used in modern smartphones. If the TV can't see the phone, try formatting the memory card or internal memory (pre-backup) into FAT32.
USB Debugging Mode: When It Is Needed
Advanced users who want to stream a screen or use specialized applications may need to enable USB Debugging.This feature is located in the Settings menu → Advanced Settings → Developers. Activate the USB Debugging switch.
When you first connect to a new device, you'll see a request for debugging permission on your smartphone screen, and you'll need to confirm the action by clicking "Allow," which gives your computer or TV (if it supports ADB) full access to the system.
☑️ Checking the developer's settings
This mode allows not only to transfer files, but also to control the phone through the TV remote, if the appropriate client program is installed. However, be careful: the enabled debugging makes the device vulnerable when connected to public charging stations.
⚠️ Warning: Do not leave debugging mode on permanently unless you are using it to develop or deep-tube your system.
Broadcasting the screen via USB-C to HDMI
If your TV doesn’t support direct file reading from your phone or you want to stream a real-time image (games, desktop), you’ll need an active USB-C to HDMI adapter. Unlike passive cables, this gadget contains a chip that converts a digital signal.
Connect the adapter to a Xiaomi smartphone and then connect it HDMI-Switch the signal source to the TV to the appropriate port. HDMI. The image should appear automatically thanks to DisplayPort Alt Mode technology.
Not all Xiaomi models support video output via USB.The flagship Mi and Xiaomi Number series usually have this feature, whereas the budget Redmis can be limited to data transfer only.
List of Xiaomi series with video output support
To control the broadcast, use the notification bar, where you can see the Translation button, or you can select the screen expansion or duplication mode, which is convenient for working with documents.
Connection methods comparison: USB vs Wi-Fi
The choice between a wired and wireless connection depends on your goals. A wired USB connection provides maximum stability and speed, but limits mobility. Wi-Fi (via Mi Cast or DLNA) gives freedom of movement, but depends on the quality of the router.
The table below provides a detailed comparison of the characteristics of both methods for.
| Characteristics | USB-cable (MTP/HDMI) | Wi-Fi (Miracast/DLNA) |
|---|---|---|
| Signal stability | High (100%) | Depends on the router. |
| Video quality | No compression (maximum) | Compression possible. |
| Delay (Latency) | Minimum | Notable (0.5-2 sec) |
| Mobility | Limited by cable length | Within the network coverage |
| Battery consumption | Charging or low consumption | High-end spending |
To watch movies in 4K HDR without snatching is clearly preferable USB-linkage HDMI-If you just want to show a photo album to your friends, the wireless method is more convenient.
💡
Use it. USB-Connecting to games on TV to minimize input lag, which is critical in action and shooter games.
Solving and eliminating errors
Often users are faced with a situation where the phone is charging, but the files are not displayed. First of all, check if the smartphone screen is unlocked. For security reasons, Android does not give access to data on the locked device.
If the TV says "file format is not supported," the problem lies in the file system. FAT32 solves the problem 90% of the time. USB-TV devices because they may not have enough power.
If the image doesn't appear through the adapter, check the resolution support. Some older TVs don't understand 1920×1080 at 60Hz from modern smartphones. Try changing the resolution in the phone's screen settings.
⚠️ Attention: When you use navigation or heavy apps when you connect to TV, your smartphone can get very hot.
If nothing works, reboot both devices. Sometimes the Media Server system process on the TV freezes and requires restarting to detect new gadgets.
💡
The key to success is the right data-enabled cable and choosing MTP mode in smartphone notifications.
Additional opportunities through USB-modem
Few people know, but connecting Xiaomi to the TV through the USB, You can give away the Internet. If you have a Smart TV no Wi-Fi module or it is broken, activate the phone function «USB-modem in the settings of the access point.
The TV will see the phone as a wired network connection, which allows you to watch online cinemas over 4G/5G mobile Internet, if the connection speed allows, and this method works more stable than Wi-Fi distribution, because it eliminates packet loss through the air.
To activate, go to Settings → Wi-Fi Access Point → USB-Make sure the mobile internet is on, which will save the day the router suddenly stops working while watching the movie.