Modern smartphone users often want to move images from a small display to a larger screen for comfortable viewing of movies or photos. Xiaomi And Redmi are in an advantageous position because the integration between these brands' devices is deeply integrated. You won't need complicated adapters or HDMI cables if both devices support wireless data transfer.
The core technology that enables screen mirroring, called Miracast. It's built into the Android operating system and into the MIUI or HyperOS interface used in TVs. The setup process typically takes just a few minutes if the basic network hardware requirements are met. However, sometimes users encounter problems with devices simply not seeing each other in the list of available devices.
In this article, we'll cover all the connection details in detail, examining the system's built-in tools and third-party apps. You'll learn how to troubleshoot common connection errors and understand why your router's speed can impact image quality. It's important to understand that the stability of your video stream directly depends on the signal quality in the room.
Network requirements and preparation phase
Before you begin the active setup phase, you need to ensure your infrastructure is ready to handle heavy video content. The most important rule: both your smartphone and TV must be connected to the same Wi-Fi network. If you have a dual-band router, make sure both devices are on the same frequency, preferably 5 GHz, as it provides higher throughput.
Check the software version on both devices. Manufacturers regularly release updates that fix communication protocol bugs. On the TV, this can be done through the menu. Settings → About TV → System updateOn a smartphone, the path usually goes through Settings → About phone → MIUI version.
⚠️ Attention: If your router has a Client Isolation feature or a guest network with limited access, devices may not be able to detect each other. Make sure your router settings allow communication between devices on the local area network (LAN).
☑️ Check before connection
It's also worth considering the distance between devices. Although Wi-Fi has a good range, it's best to be in the same room for initial pairing and stable operation. Concrete walls or strong sources of interference, such as microwave ovens, can significantly degrade signal quality.
Using the built-in "Cast" feature on Xiaomi
The easiest and fastest way to display an image is to use MIUI's native feature. This method doesn't require any additional software and works out of the box on most Redmi and Xiaomi models. The technology broadcasts exactly what you see on your smartphone's screen, in real time.
To start the process, pull down the notification shade and find the "Cast" icon (sometimes called "Wireless Monitor" or "Cast"). If the icon isn't available in the quick access menu, tap the pencil or three dots in the corner of the menu to edit the widget list and add it.
Once activated, the phone will begin searching for available devices. Your TV and set-top box should appear in the list. Xiaomi or RedmiClick on the title, and after a few seconds, the image from your phone will appear on the big screen. It's important to note that in this mode, the phone may lock, but the video will continue playing.
- 📱 Open the notification shade and find the "Broadcast" button.
- 📺 Wait until your TV's name appears in the list.
- 🔗 Tap to connect and confirm the request on the TV screen if it appears.
- ⏹ To exit, use the "Disconnect" button in the floating window on your phone.
If you use "Broadcast" mode, your smartphone's battery will drain faster than usual because the Wi-Fi module is constantly transmitting data. It's recommended to keep your phone charged or connected to a power source if you plan on watching for long periods.
Broadcast via the Google Home app
If Xiaomi's standard tools don't work for some reason, or you need more advanced functionality, the official Google app will come to the rescue. Google Home is the standard for devices with Chromecast built-in support, which is relevant for many modern Android TVs.
First you need to download the app from the store Play Market and log in to your Google account. Once launched, the program will automatically scan the network and find connected smart devices. Select your TV from the list of devices.
In the TV control menu that opens, find the "Cast my screen" button. The system will warn you that the audio and video from your smartphone will be broadcast to the TV. Click "Start Casting." This method is often more stable than the built-in method, as it uses Google protocols.
| Parameter | Built-in MIUI broadcasting | Google Home | DLNA applications |
|---|---|---|---|
| Signal delay | Minimum | Average | Depends on the file |
| Battery consumption | High | High | Short |
| Picture quality | Depends on the signal | Adaptive | Original |
| Sound | It is transmitted | It is transmitted | It is transmitted |
⚠️ Attention: Some content-protected apps (such as Netflix or online movie theaters) may block screen mirroring via Google Home due to HDCP copyright protection. In these cases, the image will be black, but the audio will continue.
Transfer videos and photos via DLNA
When it comes to viewing downloaded movies or a photo gallery, full screen mirroring isn't always convenient. It forces the phone to remain awake, draining battery power. For media files, it's better to use the mirroring technology. DLNA, which allows the TV to independently play content on the phone.
To do this, you'll need a file manager or video player with DLNA support. Apps like VLC for Android, XPlayer Or the standard Xiaomi gallery app. Open the video file, tap the "Broadcast" icon (the rectangle with waves), and select your TV.
In this scenario, the phone acts merely as a remote control and server. You can minimize apps, answer calls, or play games, and playback on the TV will not be interrupted. This is especially convenient for watching long lectures or movies.
Why is DLNA better for video?
When using DLNA, the TV buffers the video stream automatically. This reduces the load on the smartphone's processor and prevents image stuttering if the phone suddenly receives a notification or call. The protocol is optimized specifically for media streaming, not for duplicating the interface.
Furthermore, many modern Xiaomi TVs allow direct access to phone folders via the built-in media player if the smartphone has access to the local network. In this case, you might not even need intermediary apps; simply finding the phone in the TV's network environment is enough.
Third-party applications for complex cases
There are situations when standard protocols fail or specific settings are required, such as high-quality audio transmission or mouse control from a phone. Then specialized utilities from the Play Market come to the rescue. One of the most popular is Cast to TV - XCast or Web Video Caster.
These apps often have their own codecs and compression algorithms, allowing them to stream video formats that the TV's native player doesn't understand. For example, they can convert audio tracks on the fly. DTS V AAC, if the TV does not support the first format.
Installing this software is simple: download the app to your phone, and install the companion app from the built-in Xiaomi app store on your TV (if needed). After pairing via a QR code or IP address, access to advanced functionality is unlocked.
- 🚀 Web Video Caster — ideal for streaming video from a browser on your phone.
- 🖥 TeamViewer QuickSupport — allows you not only to see the screen, but also to control the phone with the remote control (requires configuration).
- 🎮 GamePad — turns your phone into a gamepad for Android TV games.
- 📂 X-plore — a powerful file manager with a built-in DLNA server.
Using third-party software may require permission to display on top of other windows and access the file system. Without these permissions, the application will not be able to capture images or read video files for transfer.
Troubleshooting: TV doesn't detect phone
The most common issue users encounter is a device not appearing in the list of available connections. If you've tried everything above and there's no result, start by rebooting the router. Simply turning the power off for 10-15 seconds often clears network table errors.
Check that "Data Saver" or "Antennas" mode isn't enabled on your phone. Sometimes aggressive battery optimization in MIUI blocks background device detection services. Go to battery settings and allow streaming apps to run in the background without restrictions.
It's also worth checking your date and time settings. If the time on your phone and TV is significantly different, the security certificates may not match, and the connection will fail. Set both devices to automatically sync their time over the network.
⚠️ Attention: Antivirus programs or firewalls installed on your smartphone may be blocking incoming and outgoing connections on your local network. Try temporarily disabling your protection to check.
The impact of a router on broadcast quality
Image quality and the absence of buffering directly depend on the specifications of your wireless equipment. Streaming Full HD or 4K content requires stable speed. Older routers 802.11n may not be able to handle the flow, especially if the channel is noisy from neighbors.
The ideal solution is to use a router that supports Wi-Fi 5 (AC) or Wi-Fi 6 (AX)These standards provide sufficient channel bandwidth to transmit a video stream with a bitrate of up to 50-100 Mbps without loss. The router's position is also important: it should be positioned so that the signal reaches both the TV and the phone without obstruction.
If your router is dual-band, make sure both devices are connected to the network. 5 GHz. Range 2.4 GHz It is heavily loaded and susceptible to interference from Bluetooth headsets and microwaves, which can cause artifacts on the screen.
In some cases, manually setting the Wi-Fi channel can help. If neighboring routers are using the same channel, collisions can occur. Use Wi-Fi analyzer apps on your phone to find a free channel and enter it into the router settings via the web interface. 192.168.0.1 or 192.168.1.1.
Frequently Asked Questions (FAQ)
Is it possible to broadcast a screen if there is no internet, only a local network?
Yes, Miracast and DLNA don't require internet access. Both devices need to be connected to the same router, which creates a local network. Even if your ISP's cable is disconnected, streaming will work.
Why is there sound but black picture when broadcasting a video?
Most likely, HDCP protection against content copying has been triggered. This is typical for paid services (Netflix, IVI, Okko). In such cases, you should use the built-in "Cast" button within the video service app itself, rather than general screen mirroring.
The image is lagging when playing a game on my phone, what should I do?
Input lag is inevitable with a wireless connection. For gaming, it's best to use a wired connection or lower the streaming resolution in the settings. Also, close background apps on your phone to free up CPU resources.
Does Redmi Note support older TV models?
Yes, support depends not on the phone model, but on the Android version and the presence of a Wi-Fi Direct module. Almost all modern Redmi and Xiaomi smartphones support the Miracast protocol, which is necessary for connecting to any Smart TV.
How do I turn off broadcasting if my phone battery is dead?
Typically, the connection is disconnected automatically when the connection is lost. If the TV is frozen on the phone screen, try pressing the "Home" or "Back" button on the TV remote, or physically unplug the TV for 10 seconds to reset the buffer.