Modern smartphones Xiaomi have powerful multimedia capabilities that allow you to turn any compatible TV into an entertainment center. Users often wonder how to display an image or transmit sound from their phone to a large screen using wireless technology. The most accessible method that does not require complex equipment is to use the protocol Bluetooth, which is built into the vast majority of devices based on Android.
However, there is a common misconception: many owners Redmi i POCO believe that via Bluetooth you can directly broadcast a video stream from the Internet to a TV as easily as via Wi-Fi. In fact, the bandwidth of this interface is not enough to transmit high-definition video in real time. However, this method remains relevant and easy to set up for transferring audio, photos and controlling a TV media player.
In this material we will analyze in detail the process of pairing devices, explain the technical limitations of data transfer and offer alternative solutions for fully watching movies. You will learn how to properly configure MIUI to work with external displays and what nuances should be taken into account when choosing a connection method.
Technical capabilities and limitations of Bluetooth when transmitting media
The protocol Bluetooth was originally developed for exchanging small amounts of data and organizing wireless peripherals. In the context of multimedia, it does an excellent job of transmitting audio signals in SBC, AAC or aptXformats, which allows you to use the TV as a high-quality speaker system for a smartphone.
When it comes to video, the situation changes dramatically. The standard data transfer rate in Bluetooth 5.0, which is used in new models Xiaomitheoretically reaches 2 Mbit/s, but in practice it is much lower for a stable connection. Streaming video in resolution 720p requires a stable channel from 5 to 10 Mbit/s, and for 1080p and higher - even more.
Therefore, if you try to play a movie through a standard file transfer interface via Bluetooth, you will encounter constant buffering or a complete lack of playback. The TV will be able to accept the file, but the process will take hours, and you won’t be able to watch it on the fly. The exception is specialized codecs and proprietary solutions from manufacturers that compress the video stream to a minimum, but the picture quality suffers critically.
⚠️ Attention: Do not try to transfer movies larger than 100 MB via a file manager via Bluetooth for instant viewing. This is technically impossible without first downloading the file to the TV's memory, which can take several hours.
However, connecting Android and Smart TV via Bluetooth is useful for other scenarios. You can use your phone as a remote control, stream music playlists, or display photo slideshows on the screen. For these tasks, delays and speed limits are not critical.
Step-by-step guide for pairing Xiaomi and Smart TV
The process of connecting a smartphone Xiaomi to the TV begins with activating the detection mode on both devices. The interface MIUI may differ slightly depending on the version of the shell, but the logic of action remains the same for all models of the series Redmi Note and flagships Mi.
First you need to make sure that the wireless communication module is active. Go to your phone settings and find the section responsible for connections. Here it is important not only to turn on the slider, but also to make the device visible to external scanners.
☑️ Preparing for pairing
On the TV side, the procedure depends on the manufacturer. On models Samsung you need to go to the signal sources menu and select Bluetooth, on LG to the device connection settings. After both gadgets enter search mode, they should see each other in the list of available devices.
When connecting for the first time, the system will ask you to confirm pairing. A digital code will appear on the screens of both devices, which must match. If the codes are identical, confirm the action by clicking the "OK" or "Connect" button. After a successful procedure, the icon of the connected device will appear in the status line of the phone.
- 📱 Open
Settingson your smartphone Xiaomi and go to the sectionBluetooth. - 📺 On the TV remote control, press button
InputorSourceand select Bluetooth mode. - 🔗 In the list of available devices on your phone, find the name of your TV and click on it to start the pairing process.
- ✅ Confirm that the PIN code matches on both screens to complete connections.
Sometimes automatic connection does not work the first time due to a cache of old connections. In this case, it is recommended to delete the TV profile from the list of saved devices on your phone and perform the procedure again. This clears protocol handshake errors.
Audio broadcasting and media player control
After successful pairing, audio stream transmission becomes the most requested function. This allows you to watch movies on the TV using its built-in acoustics, while the video content is processed by the smartphone or downloaded directly to the TV through other channels.
To configure audio output, you need to go to the additional Bluetooth settings. The interface MIUI often hides the device profile setting. By clicking on the gear icon next to the name of the connected TV, you will see switches for traffic types: "Media Audio", "Calls" and sometimes "Contacts".
Make sure the switch Media sound is activated. If this item is missing or inactive, it means that the TV does not support the A2DP (Advanced Audio Distribution Profile) required for transmitting high-quality stereo sound. In this case, the sound will be played only through the phone speaker.
If the sound is played with a delay relative to the picture, try changing the "Bluetooth Codec" parameter to SBC in the developer settings on Xiaomi, as it is the most stable, although of lower quality than aptX.
Playback control is also carried out via phone. The standard player interface on the lock screen or in the notification shade allows you to pause, rewind and adjust the TV volume. This is convenient when the TV remote control is lost or located far away.
⚠️ Attention: When connecting several devices to one sound source (for example, headphones and a TV at the same time), a priority conflict may occur, causing the sound to disappear on both devices. Turn off unnecessary gadgets before watching.
It is worth noting that some streaming applications, such as Netflix or YouTubemay block audio output via Bluetooth due to DRM (copyright protection) restrictions. In such cases, the system automatically switches the audio output to the smartphone speaker, and it is impossible to bypass this using standard means.
Why you can’t watch video directly via Bluetooth
Many users mistakenly believe that the “Broadcast” function in the Bluetooth menu allows you to duplicate the screen for watching movies. This is a fundamental misunderstanding of wireless network architecture. The bandwidth of the Bluetooth channel is narrow, like the neck of a bottle, and is not able to pass through a stream of video data in real time without significant losses.
Technically, when you try to mirror the screen through this protocol, you will get a slide show with a refresh rate of 1-2 frames per second and out-of-sync audio. The image will disintegrate into pixels, and the color rendition will be distorted. Therefore, manufacturers do not implement the video streaming function through the standard Bluetooth stack.
There are third-party applications in Google Playthat promise video streaming via Bluetooth, but they work on the principle of pre-buffering. That is, you send a file, wait for it to load on TV, and only then watch it. This is not online viewing from the Internet.
| Parameter | Bluetooth 5.0 | Wi-Fi Direct | HDMI (cable) |
|---|---|---|---|
| Max. speed | ~2 Mbit/s | ~250 Mbit/s | ~18 Gbit/s |
| Video support | No (photo only) | Yes (Full HD/4K) | Yes (8K) |
| Audio latency | High (100-300 ms) | Low (<50 ms) | Minimum |
| Range | 10 meters | Up to 200 meters | Cable length |
The table shows that for multimedia tasks, Bluetooth is inferior to other technologies in all key parameters. Its niche is the transfer of commands, audio and small files, but not video content.
Alternative ways to broadcast video from Xiaomi to TV
If your goal is to watch movies from the Internet on a big screen, you should forget about Bluetooth and use technologies based on Wi-Fi. Smartphones are equipped with excellent Wi-Fi modules that support image broadcast standards. The most popular method is the Cast function built into the shell. It uses protocols Xiaomi are equipped with excellent Wi-Fi modules that support image broadcast standards.
The most popular method is the Cast function built into the shell MIUI. She uses protocols Miracast or Google Cast. To work, both your phone and TV must be connected to the same Wi-Fi network. In this case, the phone encodes the video stream and sends it over the local network to the TV, where it is decoded and displayed on the screen.
To activate this function, lower the notification shade on the phone and find the “Broadcast” or “Projection” icon. By clicking on it, the smartphone will begin searching for available displays on the network. Select your TV from the list, and the image from the phone screen will instantly appear on the large monitor.
- 📡 Make sure that both devices are connected to the same network
Wi-Fi(preferably 5 GHz for stability). - 📲 On your phone, open the control center and click the icon
Broadcast. - 🖥️ Select your TV in the list of found devices to start mirroring.
- ▶️ Launch the movie in a browser or application, the image will be duplicated on TV.
Another option is to use technology DLNA. Many video players on Android, for example VLC or MX Playerhave a built-in function for sending videos to compatible TVs. In this case, the phone acts as a controller, telling the TV which file to download and play from the network, without loading its processor by decoding the picture.
⚠️ Attention: When using broadcasting via Wi-Fi, the smartphone's battery drains much faster than usual. It is recommended to keep the phone on charge while watching movies for a long time.
Solving problems with connection and signal quality
Even with the right technologies, users may encounter problems: the image is slow, the sound lags, or the device does not see the TV at all. Most often, the reason lies in overloaded wireless airwaves or outdated software.
The first step should always be to reboot both devices. This clears temporary network service caches and resets hung processes. If the problem persists, check the firmware version on your TV and phone. Manufacturers regularly release updates that correct protocol compatibility errors.
On smartphones Xiaomi there is a hidden developer menu where you can configure Bluetooth settings. To access it, you need to quickly click on the build number seven times in the “About phone” section. After that, the “For Developers” item will appear in the additional settings.
Settings -> About phone -> MIUI version (press 7 times) -> Additional settings -> For DevelopersHere you can try changing the Bluetooth protocol version or turning off the absolute volume level if the sound is played too quietly or too loudly. However, be careful: incorrect settings can lead to unstable operation of the communication module.
Secret codes for diagnostics
On some Xiaomi models, the engineering menu works by code ##6484##. There you can run a Bluetooth module test to check its hardware health. If the test fails, the problem may be physical.
If none of the methods help, your TV may not support the modern codecs or transmission protocols that your phone uses. In this case, the only reliable solution is to purchase an external adapter, for example Chromecast or Apple TV, which connects to the HDMI port and takes over the signal reception functions.
Frequently asked questions (FAQ)
Is it possible to connect a phone to an old TV without Smart TV via Bluetooth?
It is impossible to directly connect a smartphone to a regular TV without the Smart TV function via Bluetooth to transmit video. Such TVs do not have an operating system and decoders for signal processing. However, you can buy a special Bluetooth receiver that connects to the AUX or RCA jack of the TV. In this case, you will only be able to transmit sound from the phone to the TV speakers, but the image will remain on the smartphone screen.
Why is there a delay in sound when connecting via Bluetooth?
Sound delay (latency) is an inherent feature of Bluetooth technology. The signal takes time to be encoded, transmitted over the radio channel, and decoded at the receiving end. Typically the delay is between 100 and 300 milliseconds. For music this is imperceptible, but when watching a video, the desynchronization of lips and voice becomes obvious. This cannot be completely corrected; it can only be minimized by using codecs with low latency (aptX Low Latency), if both the phone and the TV support them.
How to display the Xiaomi screen on a TV if there is no "Broadcast" button?
In some versions of MIUI, the icon may be hidden. Try searching for the "Mi Remote" or "Cast" app in the "Tools" folder. You can also go to Settings -> Connection and sharing -> Broadcast. If the function is not available in software, install a third-party application from Google Play, for example "Screen Mirroring" or "Cast to TV", which emulates this protocol.
Does Bluetooth connection affect the Internet speed when watching online movies?
No, the Bluetooth module itself operates at a frequency of 2.4 GHz, which can overlap with the Wi-Fi range, but modern chips use adaptive frequency hopping techniques to minimize interference. However, if you use Bluetooth to transmit audio and Wi-Fi to download video, and the router is located far away or operates in a congested 2.4 GHz band, there may be micro-network slowdowns. For ideal results, use 5 GHz Wi-Fi for the Internet.
Is it safe to leave pairing on all the time?
Technically it is safe, but it is not recommended in terms of power consumption and data security. Always-on Bluetooth module drains your phone's battery faster. Additionally, in rare cases, attackers may attempt to exploit protocol vulnerabilities (such as BlueBorne) to gain access to the device if the phone does not have security updates installed. It is better to turn off Bluetooth when you are not using it to transmit media.