Connecting Xiaomi Redmi 9 to TV via the USB-cable: Instructions

Modern smartphones like the Xiaomi Redmi 9 have powerful multimedia capabilities that you often want to broadcast to the big screen. Users often look for ways to display images or transfer files to the TV using standard media. USB-This seems to be the easiest and most affordable option, without requiring the purchase of additional adapters or the configuration of complex wireless networks.

However, when trying to connect Redmi 9 and Smart TV straight through USB And many people have a lack of response from television. USB-The port on a smartphone does not always work as a full-fledged video output without special conditions. In this article, we will discuss in detail the technical nuances of such a connection, methods of data transmission and methods of broadcasting images if direct connection is not possible.

It is important to understand that USB-The cable is primarily designed to charge and transfer files, and not to broadcast a video stream live, as HDMI. However, there are workarounds and specific system settings. MIUI, We'll look at both standard methods and advanced settings for power users.

Technical limitations and capabilities of USB on Redmi 9

Xiaomi Redmi 9 is equipped with a USB Type-C port that supports USB 2.0. This means that data transfer speeds are limited and port functionality depends on software support from the operating system. Unlike flagship models, budget devices rarely have built-in support for USB-C to HDMI Alt Mode technology.

This technical limitation implies that when the cable is connected to the TV, the TV will not see the smartphone as an external source of video signal, similar to a satellite receiver or laptop. The TV can only define the device as a data storage device if the smartphone goes into the appropriate mode of operation.

⚠️ Note: Don’t try to use cheap adapters USB-HDMI, They're bought on marketplaces, unless Redmi 9 specs say it supports video output, at best they don't work, and at worst they can overheat the power controller.

Nevertheless, the port USB Android allows you to switch port modes, which gives you access to the phone's file system from the TV if the latter supports reading. USB-This is useful for viewing photos or playing video files stored in the memory of the device.

Preparation of equipment and compatibility check

Before any manipulations, you need to make sure that the components used are in good condition. The quality of the cable is critical, especially if you plan to transfer large amounts of data or use a smartphone in modem mode. Cheap cables often only support charging and do not have lines for data transfer.

To successfully connect Redmi 9 to your TV or computer, you will need to:

• 🔌 Original or certified cable USB Type-C with data transfer support.
• 📺 Television with function support USB Media Player or Smart Hub.
• 🔋 Charged battery of the smartphone (minimum) 20-30%) prevent sudden shutdown.
• 📱 Access to Developer Settings (for advanced debugging features).

Check the connectors for dust and dirt. The pile often accumulates in your smartphone pocket, which prevents the contacts from contacting tightly inside the Type-C connector. Carefully clean the port with a non-metallic object, such as a wooden toothpick or compressed air.

Set-up of the regime USB-plug-in MIUI

By default, when you connect to a computer or other host device, the Xiaomi Redmi 9 goes into Charge Only mode. This is done for security reasons to prevent unauthorized access to data. In order for the TV or PC to see the files, you need to manually change this setting.

Once the devices are physically connected, unlock your smartphone screen. Swipe from top to bottom to open the notification bar. You will see a USB system notification, such as "Charge via USB." Click on this notification to open the mode selection menu.

Settings → About Phone → (7 times tap on "Version MIUI") → Settings → Additional settings → For developers → Debugging on USB

From the menu that opens, select File Transfer (MTP) mode, which allows external devices to read the folder structure of a smartphone. PTP mode can be used as an alternative if MTP does not work, but it restricts access to only media files.

If the mode selection menu doesn’t appear automatically, go to Settings → Connected Devices → USB. On some versions of MIUI, the path may be different, so it’s easiest to search by settings by typing in a “USB” request.

Viewing files from your phone on TV

After the regime MTP Now, you can start to look at the contents of your smartphone on the big screen. TV Have a built-in file manager or Media app that scans the connected USB-port.

Use the TV remote control to go to the signal source menu (Source/Input). Choose yours. USB-The TV must define the connected device as "Redmi". 9" Or Android. Inside, you'll see the standard Android folder structure: DCIM (Camera), Download, Movies and others.

Navigation through files is carried out using the TV remote. Please note that the speed of the gallery or menu can be lower than when working with a regular flash drive, since the MTP protocol has overhead for processing requests. For comfortable video viewing, it is better to use files with a bitrate that does not exceed the capabilities of the TV decoder.

In some cases, Android TV or Tizen (Samsung) may request permission to access. The smartphone screen will pop up a "Allow data access?" pop-up. Be sure to click Allow, otherwise the TV will only see an empty folder or the device will not see at all.

Using USB debugging for advanced users

Those who want to gain full control of the device or stream the screen through specialized software (such as Scrcpy on a PC, which can then be displayed on TV), will need to activate the developer mode.

To enable debugging, open Settings → Find the line "Version." MIUI" And press it fast. 7-10 And then you'll see a new item in the "Settings" menu, which is "Developers for Developers".

• 🛠 Find the debugging switch by USB and activate it.
• 🔒 When you first connect, confirm the key print RSA smartphone-screen.
• ⚙️ Turn on the “Do not turn off the screen” option when you connect USB, So that the phone does not go into sleep mode during operation.

⚠️ Attention: Debugging mode for USB Never turn on this feature and never connect your phone to unknown public charging stations or other computers, as this creates a vulnerability to data theft.

Using tools like ADB (Android Debug Bridge) allows you to transfer commands and files directly, bypassing standard interface constraints, which is especially useful if the phone’s graphics shell is damaged, but the system works.

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If the USB debugging menu is permanently lost or rebooted when you enable it, try turning off the “Above Other Windows” option in the special features settings, as it may conflict with the confirmation dialog box.

Alternatives: When USB-cable

If direct USB connectivity doesn’t work (the TV can’t see the phone or play video), it’s worth considering alternative methods that often work more consistently on budget models like the Redmi 9.

The most popular method is the Cast function: Make sure that the phone and TV are connected to the same Wi-Fi network. In the notification curtain, look for the Translation or Projection icon. The phone will find the available devices and suggest you connect. This duplicates the smartphone screen on the TV in real time.

Another option is to use intermediary apps like Xiaomi Mi Remote or universal remotes if the TV supports Wi-Fi Direct control. You can also use Chromecast, built into many modern TVs, to stream content from YouTube or Netflix apps directly, without straining the phone's processor.

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USB-Connection is ideal for heavy file transfer and local video viewing, but for screen duplication, Wi-Fi Cast wireless technologies often provide better performance and convenience.