Modern smartphones such as Xiaomi Redmi 9, have become powerful multimedia centers capable of storing gigabytes of high-definition video. However, watching content on a small 6.53-inch screen isn't always comfortable, especially when you want to immerse yourself in the cinematic experience. Wireless technology makes it easy to stream images to a larger screen, eliminating the need to fiddle with cables and adapters.
Connection process Redmi 9 Smart TV relies on a local Wi-Fi network, ensuring stable data transfer without loss of quality. There are several transmission protocols, each with its own characteristics depending on the TV model and MIUI operating system version. In this article, we'll cover all the current methods, from built-in system functions to third-party apps.
It is important to understand that the success of the operation depends not only on the correctness of the actions, but also on the quality of the router signal. Wireless connection It's sensitive to interference, so for best results, both devices must be within a strong reception area. Let's look at a step-by-step algorithm for various usage scenarios.
β οΈ Note: The MIUI interface may differ slightly depending on the firmware version installed on your Redmi 9. The location of some menu items may vary.
Technical requirements and equipment preparation
Before you begin setup, you need to make sure your equipment meets the minimum technical requirements. Redmi 9 Equipped with a Wi-Fi module supporting the 802.11 a/b/g/n/ac standard, operating in two frequency bands: 2.4 GHz and 5 GHz. For high-definition video streaming (Full HD and above), it is highly recommended to use the 2.4 GHz band. 5 GHz, as it provides higher throughput.
The TV must also support Smart TV technology or have a connected set-top box with similar features. The devices must be on the same local network. This means they must be connected to the same router, even if they use different access points (main and guest).
Check the amount of free RAM on your smartphone. For the system services to work properly, streaming requires RAM The system isn't completely overloaded with background processes. Close heavy applications before starting the setup to avoid delays or audio desync.
βοΈ Preparing for connection
Using the built-in Cast function
The Android operating system installed on the Redmi 9 already has a built-in wireless display function. It implements the protocol Miracast, which allows you to mirror your smartphone's screen to your TV in real time. No additional software installation is required to activate this feature.
Open the notification shade by swiping down from the top and look for the "Broadcast" icon (sometimes called "Broadcast" or "Wireless projection"). If the icon is not in quick access, go to Settings β Connection and Sharing β BroadcastTurn on the switch and the phone will start searching for available devices.
A connection confirmation prompt may appear on the TV screen. Use the remote control to select "Allow" or "Accept." Once paired successfully, the image from the Redmi 9 screen will appear on the TV. Picture quality depends on the Wi-Fi speed, but the delay may be between 0.5 and 2 seconds.
What to do if the TV is not found?
If the search doesn't yield any results, make sure Screen Mirroring or Anyview Cast is enabled on your TV. On some Samsung models, this is called Smart View, and on LG models, it's called Screen Share. You can also try restarting your router.
Broadcast via YouTube app and streaming services
The most popular way to watch videos is by using the built-in casting feature in client applications such as YouTube, Netflix or IVIThis method differs from full screen broadcasting in that the phone acts only as a remote control, while the video stream is downloaded directly from the internet by the TV.
Launch the YouTube app on your Redmi 9 and select a video. Tap the rectangle icon with Wi-Fi waves in the corner of the player. Select your TV from the list of available devices. The video will open on the big screen, and playback controls will appear on your phone.
The main advantage of this method is that it saves battery power and doesn't put a strain on the smartphone's processor. Video quality is adjusted automatically based on internet speed, supporting formats up to 4K HDR if the TV has the appropriate specifications.
β οΈ Note: For the casting feature to work, Google accounts on both your phone and TV (if using Android TV) must be authorized, although this is not always a strict requirement for basic casting.
Connection via third-party applications (Mi Remote and others)
If standard methods don't work or the functionality isn't sufficient, you can use specialized software. Ecosystem Xiaomi offers an application Mi Remote, which allows you to control equipment via IR or Wi-Fi. However, for multimedia streaming, universal solutions are better suited.
Application Web Video Caster or BubbleUPnP Cast allows you to stream video files stored on your phone's memory or stream video from browsers that don't have native Cast support. Install the app on your Redmi 9 and, if needed, the companion app on your Smart TV.
In the program interface, select the media file source (local storage or URL) and click the connect to playback device button. These programs can often transcode video on the fly if the TV doesn't support the file format, for example, MKV or AVI with certain codecs.
Comparison of connection methods and their characteristics
Choosing the optimal connection method depends on your goals: whether you simply need to share photos with friends, watch a movie in high quality, or play a mobile game on a big screen. Each method has its own technical limitations and advantages.
The Miracast protocol, used for full-screen mirroring, creates a direct connection or uses the local network to transmit the video stream. This puts a strain on the Redmi 9's battery, as the screen must be constantly on and the video processor must encode the image.
DLNA and Chromecast (built into apps) work differently. The phone only sends a "play" command and a link to the content. The TV downloads the video itself. This frees up the smartphone, allowing you to use it for calls or other tasks without interrupting your viewing experience.
| Method | Image quality | Impact on battery | Latency |
|---|---|---|---|
| Miracast (Broadcast) | High (depending on Wi-Fi) | High | Average (0.5-2 sec) |
| YouTube Cast | Maximum (up to 4K) | Low | Minimum |
| DLNA (Photo/Video) | Original file | Average | Absent |
| Game Turbo | Depends on FPS | Very high | Critical (not recommended) |
Network troubleshooting and diagnostics
During setup, users often encounter situations where the phone "doesn't detect" the TV or the connection constantly drops. The first and most common cause is using different Wi-Fi frequencies. Make sure both devices are connected to the same network. Even if the router broadcasts two signals (2.4 and 5 GHz), some TVs don't detect devices on different subnets.
The second important aspect is the firewall or client isolation settings on the router. If the function is enabled AP Isolation, devices on the Wi-Fi network cannot exchange data with each other. To resolve this issue, access the router settings via a browser and disable this option.
You should also check for updates to the YouTube app or the Redmi 9 system software. In the menu Settings β About phone β MIUI version You can check the firmware's current status. Outdated software may contain bugs that block data transfer protocols.
Why is the video streaming delayed?
Lag when streaming via Miracast on the Redmi 9 is often caused by insufficient Wi-Fi bandwidth or an overheated processor. Try lowering the video resolution in the app settings or moving closer to the router. Lag is also inevitable when using the wireless display protocol due to the time it takes to encode and decode frames.
Is it possible to connect Redmi 9 to a TV without Wi-Fi?
Without Wi-Fi, connection is only possible via wired interfaces. The Redmi 9, which has a Micro-USB port, requires a special OTG to HDMI (MHL) adapter. However, this model's USB video output support is limited, so wireless connection remains the primary and most reliable method.
How to improve picture quality during broadcasting?
For improved quality, use a router that supports Wi-Fi 5 (AC) or Wi-Fi 6. Place the router within direct line of sight of your TV and phone. Avoid simultaneously running heavy downloads (torrents, games) on other devices on the network, as this creates bandwidth competition.