Modern smartphones Xiaomi i Redmi have powerful multimedia capabilities, which are often limited by the small size of the display. Most users want to watch a movie in high definition, show off vacation photos, or play a mobile game on the big screen. Fortunately, the Android ecosystem provides many tools for wireless image transmission.
In this article we will look in detail at how to broadcast from your phone to a TV via WiFi using the built-in shell functions MIUI and third-party solutions. You will learn about the technical nuances of the protocols Miracast i Chromecast, and also get answers to common problems with signal delays or lack of connection.
The main advantage of the wireless method is the absence of unnecessary wires and the ability to move freely around the room while playing content. However, for stable operation, the quality of your home network and equipment compatibility are critical.
Technical requirements and equipment preparation
Before you start setting up, you need to make sure that your equipment meets the basic requirements for organizing a wireless connection. The fundamental condition is the presence of the module WiFi both on the smartphone and on the TV. In this case, the devices must support the same data transfer standards.
Ideally, both gadgets should be connected to the same wireless network. If your router supports dual-band mode, it is recommended to use frequency 5 GHz. This will provide higher throughput, which is critical for transmitting video in resolution Full HD or 4K without artifacts.
Pay attention to the operating system version. For the “Broadcast” function to work correctly on phones Xiaomi the current version is desirable Android not lower than version 9. Outdated software may not contain the necessary drivers for modern video stream compression protocols.
⚠️ Attention: If your TV is a “regular” (not Smart TV), wireless broadcasting is not possible without purchasing additional equipment, such as a set-top box Android Box or an adapter Chromecast.
It is also worth checking the battery charge of your smartphone. The process of encoding and transmitting a video signal in real time significantly loads the processor and radio module, which leads to rapid battery drain. It is recommended to keep the device connected to charging during long sessions.
Built-in “Broadcast” function in the MIUI shell
The easiest and most reliable way to display an image is to use the native function built in by the developers Xiaomi. This method is based on a protocol Miracastthat allows you to duplicate the phone screen on a compatible TV without installing additional software.
To activate the function, lower the notification shade and find the “Broadcast” icon (sometimes it is hidden in the additional quick access editing menu). If there is no icon, go to the menu Settings, then select the section Connection and sharing and click on the item Broadcasting.
After turning on the phone will begin searching for available devices within the network range. Make sure that the signal reception function on your TV is also activated. On different TV brands it may be called differently: Screen Mirroring, Smart View (Samsung), Anyview Cast (Hisense) or simply “Wireless Monitor”.
☑️ Check before connecting
When the TV appears in the list on the smartphone screen, simply tap its name. After a few seconds, the image from your mobile device will appear on the big screen. It is important to understand that in this mode absolutely everything that happens on the phone is duplicated, including notifications and the desktop.
Using Google Chromecast technology
If the built-in broadcast is unstable or your TV is equipped with a platform Android TV, the best solution is to use the ecosystem Google Cast. Unlike mirror duplication, this technology allows you to transfer content directly from applications without loading the phone's processor.
For this method to work, the application must be installed on your smartphone Google Home. After installation, open the app and wait until it detects your TV on the local network. The device should appear in the list of available equipment.
Click on the TV icon in the application and select the “Transmit screen” or “Transmit screen” option. The system will ask for confirmation to start recording and broadcasting - agree. The image will appear on the TV with the minimum delay characteristic of this protocol.
When using Chromecast, you can minimize the application on your phone or even lock the screen - the video on the TV will continue to play, since the stream goes directly from the router to the TV.
The advantage of this method is the support of streaming services. In applications like YouTube, Netflix or Kinopoisk a special casts icon button appears. Clicking on it sends a link to the video directly to the TV, freeing up the smartphone for other tasks.
Third-party applications for broadcasting
In situations where standard tools cannot cope or advanced functionality is required (for example, broadcasting only sound or a specific window), third-party developments come to the rescue. The store Google Play offers many solutions, each of which has its own characteristics.
One of the most popular solutions is the application LetsView. It is completely free and supports many protocols. Once installed on both devices (TV and phone), you must enter the code displayed on the TV screen to pair.
Another powerful tool is AirScreen, which is often installed directly on TVs with OS Android TV. This application emulates the reception of signals AirPlay (from Apple) and Miracast, making compatibility almost absolute.
Why do paid applications work better?
Paid versions of broadcasting apps often disable advertising, remove watermarks and provide access to bitrate settings. This allows you to reduce image latency in games to a minimum, which is critical for dynamic gameplay.
When choosing third-party software, pay attention to the permissions that the application requests. To work correctly, it requires access to the local network and the ability to record screens. Avoid apps with a dubious reputation that may collect personal data.
Configuring the router for stable transmission
The quality of the broadcast directly depends on the bandwidth of your wireless network. If the image disintegrates into pixels or the sound lags behind the video, the problem most often lies in an overloaded airwave or a weak signal.
It is recommended to go to the router settings through a browser by entering the gateway address (usually 192.168.0.1 or 192.168.1.1). In the wireless mode section, make sure that the standard 802.11ac or 802.11ax (WiFi 6) is enabled, if your equipment supports it.
| Network parameter | Recommended value | Impact on broadcast |
|---|---|---|
| Frequency | 5 GHz | High speed, less interference |
| Channel width | 40 or 80 MHz | Increases throughput |
| Encryption | WPA2-PSK (AES) | Security without loss of speed |
| QoS (Priority) | Enabled for media | Reduces delays due to network load |
If the distance between the router and the TV is large, the signal may weaken. In such cases, using WiFi repeater or setting up a Mesh system for seamless covering of the house will help. It is also worth disabling the downloading of heavy files on other devices while watching.
Solving common connection problems
Even with proper setup, users may encounter difficulties. One of the common problems is that the phone sees the network, but does not detect the TV in the list of devices for broadcasting. In this case, try rebooting both devices and the router.
Sometimes the problem lies in the firewall settings or client isolation on the router. Make sure that the “AP Isolation” function is not activated in the WiFi security settings, which prevents devices on the network from seeing each other.
If sound is transmitted but there is no image, or vice versa, check the codec settings. Some older TVs do not support modern video compression formats transmitted by new smartphones Xiaomi. In such cases, installing a third-party player on the TV helps, for example VLC, which has a built-in receiver.
⚠️ Attention: When using the broadcast function in games, the delay (input lag) can reach 100-200 ms. For fast-paced shooters or rhythm games, this can make the experience unplayable. Use a wired connection or special TV game modes, if available.
If the phone screen goes dark and the broadcast stops, check the power saving settings. In the menu Settings → Battery and performance add the broadcast application to the exceptions so that the system does not “kill” the process in the background.
The stability of the broadcast is 90% dependent on the quality of the WiFi signal and the absence of interference on the air, and not on the power of the smartphone.
Frequently asked questions (FAQ)
Is it possible to broadcast the screen if there is no Internet, only a local network?
Yes, access to the global Internet is not necessary for the Miracast and local Chromecast protocols to work. The main thing is that the phone and TV are connected to the same router, which creates a local network. However, to launch online video (YouTube), you will, of course, need the Internet.
Why is the quality worse when broadcasting videos from YouTube than on a phone?
This may be due to the limitation of the WiFi channel bandwidth or the settings of the application itself on the TV. Try manually setting the maximum resolution in the video settings on your TV. Also make sure that the phone does not throttle (lower) the processor frequency due to overheating.
Does Xiaomi support audio transmission separately from the image?
The standard “Broadcast” function transmits both the picture and sound together. To transfer only audio (for example, music from Spotify to TV speakers), it is more convenient to use the Bluetooth protocol or the Cast function inside the music applications themselves, if the TV supports them.
Is it safe to enter passwords for websites during broadcasting?
No, it is not recommended. Since screen mirroring mode shows everything that happens on the phone's display, any passwords you enter, messages from instant messengers, and notifications will be visible to anyone looking at the TV. Before entering confidential data, it is better to disable the broadcast.
How to disable the broadcast if the phone is frozen?
If the sensor does not respond, try quickly pressing the power button 5 times to call up the emergency menu (if configured) or simply restart the phone by holding down the power and volume buttons. On the TV side, it is usually enough to switch the signal source (Input/Source button) to another HDMI port and back to reset the stuck connection.