Modern smartphones like the Xiaomi Redmi 9 Pro have become powerful multimedia hubs that users often want to broadcast on the big screen. Connecting your phone to your TV via a wireless WiFi network gives you access to high-resolution viewing of photos, videos and even gameplay without unnecessary wires. This is especially true for smart TV owners who want to maximize the potential of their equipment.
The process of syncing devices can seem complicated only at first glance. In fact, the Android operating system and the MIUI shell provide built-in tools for fast connection. You don't need complex cables or adapters if both devices are on the same LAN.
In this article, we will take a look at all the available methods, from the standard Translation function to using third-party applications for DLNA. We will look at the nuances of router configuration, possible connection problems and how to solve them. Follow the instructions to enjoy content on the big screen.
Preparation of equipment and network for stable connection
Before you start setting up the software, you need to make sure that the network is physically organized correctly. A wireless connection requires a stable signal, so the distance between the router, the phone and the TV is critical. Both devices must be connected to the same WiFi network, otherwise detection will be impossible.
Note the frequency of the signal. For high-resolution video (Full HD or 4K), it is preferable to use the 5 GHz band, which provides higher throughput compared to 2.4 GHz. However, it is worth remembering that the 5 GHz signal has a shorter range and passes through walls worse.
⚠️ Note: If your router is giving away two networks with the same name, make sure that both the phone and TV are connected to one of them, rather than being split between the 2.4 and 5 GHz bands, as some older detection protocols may not work through the router's gateway.
Check for software updates on both devices. On Redmi 9 Pro, go to your settings and check for system updates, as newer versions of MIUI often fix Miracast and DLNA protocol bugs. The TV is also worth updating through its system menu.
Use of the built-in Translation function in MIUI
The easiest and fastest way to display an image from the Xiaomi Redmi 9 Pro screen to your TV is to use the standard broadcast function, which is based on the Miracast protocol, which is supported by most modern Smart TVs (Samsung, LG, Sony, Philips, etc.).
To start the process, lower the notification curtain down and find the Translation icon (sometimes called Cast or Wireless Display). If the icon is not available, click on the menu edit pencil or go to Settings → Connection and Sharing → Broadcast. Activate the switch and the phone will start searching for available devices.
☑️ Pre-broadcast checks
When the TV appears on the list on your smartphone screen, click on the name of the TV, you may see a connection request on the TV screen, which you need to confirm with the remote, then the image from the phone is completely copied to the large screen, you can switch between applications, and the picture will change in real time.
It's worth noting that when you use this method, the phone screen should be turned on. If the smartphone screen goes out, the broadcast can be interrupted to save energy. There's also a slight delay in the image, which is important to consider when playing games.
⚠️ Attention: Translation duplicates the entire screen of your phone, and if you receive a private message or a call, everyone in the room will see it.
Streaming videos via YouTube and other apps
If your goal is to watch videos from platforms like YouTube, Netflix or online cinemas, then using the screen duplication function is not optimal, in which case you should use the built-in Google Cast protocol (Chromecast built-in), which allows the TV to download the video stream by itself, unloading the phone's processor.
Open an app, like YouTube, on your Redmi 9 Pro. In the upper right corner of the video player or in the application interface, find the wave rectangle icon (a broadcast symbol). When you click on it, you will see a list of available devices. Select your TV from the list.
The advantage of this method is that the phone is just a remote control, so you can fold the app, respond to messages, or even turn off the screen of your smartphone, and the video on the TV will play back, and the quality of the picture is often higher, because the TV decodes the stream directly.
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If the broadcast icon doesn’t appear, make sure that YouTube apps on your phone and TV are updated to the latest versions.
Not all apps support this feature. It's usually available in media content. You can use the same principle to view gallery photos if the Gallery or Google Photos app has a Cast button, or use the methods described below.
Configure DLNA through built-in tools and Mi Remote
DLNA allows you to transfer media files (photos, videos, music) between devices on a local network. Unlike Miracast, it does not broadcast a screen, but sends a specific file to play on a TV. Xiaomi smartphones often pre-installed the Mi Remote app (Mi Remote) that can perform this function.
Launch the Mi Remote app and add your TV if you haven't already. Go to the Media Management section. You can also use the standard MIUI file manager. Find the video or photo you want, click on it, and select the Send to Device option or DLNA icon.
| Parameter | Miracast (Translation) | DLNA (Media) | Google Cast |
|---|---|---|---|
| Type of transmission | Screen duplication | File transfer | Streaming video |
| Dependence on the phone | High (screen on fire) | Low. | Low (remote) |
| Quality. | Depends on WiFi. | Original file | Adaptive. |
| Sound. | It's from video. | It's from video. | It's from video. |
If the built-in tools can’t see the TV, you can use third-party apps from Google Play, such as “BubbleUPnP” or “LocalCast.” They have more flexible codec settings and work better with formats that the TV “does not understand” by default, transcoding them on the fly.
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DLNA is ideal for viewing heavy video files from a phone’s memory, as it reduces the battery load of a smartphone compared to a full screen broadcast.
Using third-party applications to enhance opportunities
The Android and MIUI tools are good, but sometimes limited. If your TV doesn't support Miracast natively or the connection is unstable, specialized apps will come to the rescue. One of the most popular solutions is the Web Video Caster or TV Cast app.
These programs work like a browser: you open a site with a video inside the app, and it transmits a link to the media file directly to the TV. This allows you to stream content from sites that do not have official applications for Smart TV. The installation process is simple: download the application on Redmi 9 Pro and, if necessary, a companion application on the TV (although often built-in DLNA/Chromecast is enough).
- 📱 Web Video Caster: Great for streaming video from browsers, supports subtitles.
- 🖥️ TeamViewer QuickSupport: Not only does it allow you to broadcast your screen, but you can also control your phone from your TV (rarely, but it can be useful).
- 🎮 ApowerMirror: An advanced solution for gamers, allows you to broadcast the screen with minimal latency and even control your phone from PC / TV.
When using third-party software, it's important to pay attention to the permissions you give the application, and to work properly, they need access to the local network and, in some cases, to media files, without these permissions, finding devices will be useless.
Troubleshooting and troubleshooting
Even when set up correctly, there can be situations where the Xiaomi Redmi 9 Pro can’t see the TV or the connection is constantly interrupted. Most often the problem lies in the settings of the router. Make sure that the router has disabled the option “AP Isolation” (Isolation of access points), which prevents devices inside the network from seeing each other.
Another common cause is WiFi congestion. If you have a lot of neighborhood networks in your home, the signal can be unstable. Try rebooting your router or switching to another channel in your router settings. Also, rebooting the WiFi module on the phone itself helps: turn on air mode for 10 seconds and turn it off.
⚠️ Warning: Antiviruses or firewalls installed on a phone or router can block ports required for protocols DLNA Try temporarily disabling the security for the check.
What to do if the video slows down?
If nothing works, check the date and time on both devices. Time desynchronization can cause login errors in network protocols. Set up automatic time synchronization across the network in date and time settings.
Comparison of wired and wireless connection
Although the topic of this article is WiFi, it's worth mentioning the alternative: Wireless connectivity is convenient, but it's always jammed. If you plan on watching a movie in high bitrate or playing games where every millisecond matters, wired connectivity via a USB-C to HDMI adapter will be more reliable.
However, the Redmi 9 Pro features a USB 2.0 Type-C port, which unfortunately does not support video output directly (DisplayPort Alt Mode technology is not available in the Snapdragon 720G processor).This means that simple USB-C adapters on HDMI will not work. Wired connection will require special adapters that support DisplayLink technology, which work through software compression, but they are expensive and require driver installation.
For Redmi 9 Pro owners, WiFi is the main and most convenient way to display images, it does not require the purchase of additional equipment and provides sufficient quality for most tasks.
- 🚀 Speed: Wire is more stable, but WiFi 5 GHz is almost as fast as data transfer speeds.
- 🔋 Power consumption: WiFi module consumes battery, but wired connection through active adapters also requires power.
- 💰 Price: WiFi is free, a quality wired adapter for this model can cost a lot.
Ultimately, the choices are your priorities, and for everyday use, photo viewing and YouTube, wireless is the ultimate convenience leader.