Modern TVs like the Xiaomi Mi TV 4S 55 have long since ceased to be just devices for receiving air channels, becoming powerful multimedia centers. One of the most popular features for users is the ability to instantly display images from a smartphone to a large screen without using unnecessary wires. This allows you to show photos, run videos from unverified sources or even play mobile games with improved graphics and sound. However, the process of setting up the broadcast, known as Screen Mirroring, can cause questions for owners of equipment, especially in the first collision with the Android TV interface.
There are several proven ways to implement screen duplication, each with its own technical features and advantages. Owners of Xiaomi Mi TV 4S 55 can choose between Miracast and Google Cast wireless protocols, as well as use a wired connection via HDMI to achieve maximum stability. The choice of a particular method depends on your smartphone model, operating system version and signal quality requirements. In this article, we will discuss all the options available so that you can enjoy content on a large display without delays and artifacts.
⚠️ Before setting up, make sure your router supports 5GHz Wi-Fi, as high-resolution video transmission over 2.4GHz can cause slowdowns and desynchronization of sound.
Preparation of equipment and Wi-Fi network
The foundation of successful wireless broadcasting is the right organization of the local network. In order for the Xiaomi Mi TV 4S 55 and your mobile phone to “see” each other, they must be on the same subnet. This means that both devices must be connected to the same router. If you use a dual-band router, make sure that both the TV and the smartphone are connected to the same frequency, preferably 5 GHz, which provides higher bandwidth.
It’s also important to check the software’s relevance on both devices. Android TV updates often include security patches and data protocol improvements. Go to the settings menu and check the system version. On your smartphone, you should also make sure that Google Play Services are updated, as they are responsible for running the Chromecast feature.
Signal stability is critical in image quality. If the router is far from the TV, the signal may be weak, leading to compression artifacts. Ideally, the distance between the router and the Xiaomi Mi TV 4S 55 should not exceed 10 meters without wall obstructions. If you use repeaters or Mesh systems, make sure that both devices are connected to the same access node.
Use of the built-in Chromecast feature
Since the Xiaomi Mi TV 4S 55 runs on Android TV, it has native support for Google Cast technology.This is the most versatile way for Android and iOS smartphone users, since it does not require installing additional software on the TV.
To start the broadcast, open the app on your smartphone that you want to show content from. This could be YouTube, Netflix or Google Chrome. Find the broadcast icon — usually a rectangle with Wi-Fi waves in the corner. Click on it and select from a list your Xiaomi Mi TV 4S 55. The system will establish a connection, and the content will start playing on the big screen.
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If the Chromecast icon doesn’t appear in apps, make sure that geolocation and Bluetooth are enabled on the smartphone, as they are used to initially detect devices on the LAN.
The advantage of this method is that you can control playback from your smartphone, you can pause your video, adjust the volume, or flip through your photos without interrupting the output of the image to your TV, and Google Cast allows you to use your phone as a remote control, which is especially useful when watching long movies.
⚠️ Note: When using Chromecast via Google Chrome on a PC or smartphone, only the browser tab is broadcasted, not the entire screen of the device, unless the screen Translation mode is selected in the tab settings menu.
Miracast Technology and Wireless Display
Miracast (often referred to as Wireless Monitor or Translation on Xiaomi devices) allows you to duplicate the entire screen of your smartphone by displaying everything on your phone’s display in real time. Unlike Chromecast, which often only broadcasts media stream, Miracast creates an exact copy of the mobile device’s interface, which is ideal for displaying presentations, games or navigating menus.
On Xiaomi Mi TV 4S 55, Miracast support is built into the system. To activate the signal reception, you sometimes need to launch the corresponding application or select the source of the Wireless Display signal from the input menu. On Xiaomi smartphones with a MIUI shell or HyperOS, this feature is called through the notification curtain control panel called "Translation" or "Cast".
☑️ Miracast setup
It is important to note that when using Miracast, the load is placed on the smartphone processor, as it encodes the video stream, which can lead to increased battery consumption and heat of the device. In addition, the input lag in this mode can be noticeable, so for dynamic shooters this method may not be suitable, but for strategies or viewing photos it is optimal.
Wired connection via HDMI adapter
If the wireless connection is unstable or you need to transmit the image in the maximum quality without compression, the best solution will be a wired connection. TV 4S 55 you're going to need a special adapter. The type of adapter depends on the connector of your smartphone: it could be USB-C to HDMI for modern flagships or MHL-adapter.
The connection is simple: one end of the cable is inserted into the smartphone, the other into the free HDMI port on the TV, and then you need to switch the signal source on the TV by pressing the Input button on the remote and selecting the appropriate connector, for example, HDMI 1 or HDMI 2.
| Type of connection | Image quality | Delay (Latency) | Stability |
|---|---|---|---|
| Wi-Fi (Chromecast) | High (up to 4K) | Medium | Depends on the router. |
| Wi-Fi (Miracast) | High (1080p/4K) | Tall. | Medium |
| HDMI (Wire) | Maximum. | Minimum | Absolute. |
| DLNA (Media) | Depends on the file. | Low. | Tall. |
Using the cable also allows you to charge your smartphone during use if the adapter has an additional power port.This is critical for long sessions, as video transmission quickly consumes battery power. Make sure the cable supports HDMI 2.0 for 4K 60Hz.
What to do if there is no image on the cable?
Third-party broadcast applications
In situations where standard methods don’t work or require advanced functionality, third-party apps come to the rescue. The Google Play Store on Xiaomi Mi TV 4S 55 offers a variety of solutions. One popular option is the AirScreen app, which emulates the AirPlay, Google Cast and Miracast protocols, ensuring compatibility even with devices that don’t normally see the TV.
For iPhone users who want to stream the screen on Android TV, the native AirPlay feature may not work properly without additional settings. Installing a reciprocating app on the TV solves this problem. Once the app is installed on the TV and the corresponding client on the smartphone (if required), the devices connect over the local network, allowing you to duplicate the screen of the iOS device.
Another powerful tool is the LocalCast app or BubbleUPnP. They allow you not only to duplicate the screen, but also to broadcast files from cloud storage or the NAS local network. This is convenient if the video file is on your computer, and you want to watch on your TV, using your smartphone as a remote control.
⚠️ Warning: When installing third-party apps from unknown sources, be careful: some programs may contain ads or collect data about your network.
Troubleshooting and frequent errors
Even when set up correctly, there can be technical failures, and the most common problem is that the TV doesn't show up on the smartphone's list of available devices, so the first thing you should do is check if the TV is on detection mode, sometimes by restarting the Wi-Fi module on both devices or by having a full router reboot.
If the image is broadcasting but the sound is missing or late, try changing the audio output settings on the TV. Go to Settings → Device → Sound and try switching the output format from Dolby Digital to PCM. It is also worth checking if the smartphone is running energy-intensive tasks that can slow down the encoding of the video stream.
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In 90% of cases, the connection problem is solved by simply restarting the router and checking that both devices are on the same Wi-Fi network (the same SSID).
In case of permanent connection breaks when using Miracast, try to lower the output resolution on your smartphone or close the background applications.The wireless display protocol is very sensitive to interference, so having a microwave oven or a powerful Bluetooth device in close proximity can also affect communication quality.