Modern smartphones have turned into powerful multimedia centers capable of storing terabytes of video files and streaming content in 4K resolution. However, the small screen of a mobile device does not always allow one to appreciate the beauty of cinematography or comfortably watch a family film with loved ones. In such situations, there is a natural desire to transfer the image to a large display, but users often encounter technical barriers when trying to synchronize Android and the TV.
Fortunately, the industry offers many solutions, from simple cables to complex wireless protocols that allow you to stream content without losing quality. In this article, we will analyze in detail all the current connection methods, identify the pros and cons of each of them, and also help to avoid common mistakes due to which the image may be slow or there may be no sound.
Wireless broadcast through the built-in functions of Smart TV
The simplest and most popular way to display an image is to use the built-in wireless display technologies. Most modern TVs with Smart TV function support standards that allow you to duplicate the screen of a smartphone without installing third-party software. For users of Android devices, this feature is often called “Cast”, “Wireless Monitor” or “Smart View” depending on the shell manufacturer.
Before you start setting up, make sure that your TV and smartphone are connected to the same network Wi-Fi. This is critical because different subnets (for example, the guest network and the main network) can block devices from being discovered by each other. On the TV, you need to activate the signal reception mode, which in the menu Samsung is called Source > Screen Mirroring, and in LG — Input > Screen Share.
On your smartphone, open the quick settings panel by swiping from top to bottom and find the broadcast icon. After clicking, the system will begin searching for available displays within the range of the router. If the TV does not appear in the list, try restarting the router or temporarily disabling the firewall on the router, which may be blocking protocols. Miracast.
⚠️ Attention: When transmitting a high-definition video stream wirelessly, there may be a delay in sound or desynchronization of the picture, especially if the Wi-Fi network is overloaded with other devices.
Using technology Google Chromecast
The Google ecosystem offers a more advanced casting mechanism known as Chromecast. Unlike simple screen mirroring, this technology allows you to “send” content directly to the TV, freeing up smartphone resources. This means that you can minimize the application or even lock the phone, and the movie will continue to play on the big screen.
For this method to work, the platform must be installed on the TV Android TV or an external Chromecast set-top box must be connected. In popular applications like YouTube, Netflix or Kinopoisk a special rectangle icon with waves appears in the player. Clicking on it opens a list of devices for selecting the target display.
If your TV does not support the built-in Chromecast, the situation will be saved by purchasing an inexpensive dongle adapter that is inserted into the HDMI port. This gadget turns any old monitor with an HDMI input into a full-fledged smart screen that supports streaming from any compatible Android applications.
For stable operation of Chromecast, make sure that the latest versions of the YouTube and Google Home applications are installed on your smartphone and TV. Outdated software often causes connection errors.
Connection via HDMI cable and adapters
When wireless technologies fail or maximum picture quality without compression is required, a wired connection comes to the rescue. Direct connection via cable HDMI guarantees signal transmission without delay, which is ideal for dynamic games or watching movies at high bitrates.
Since modern smartphones do not have a full HDMI port, you will need a special adapter. Devices with connector USB Type-C require adapters that support technology MHL (Mobile High-Definition Link) or DisplayPort Alt Mode. It is important to check the specifications of your phone, since budget models often do not support video output via the USB port.
The connection process is as simple as possible: insert the adapter into your smartphone, connect the HDMI cable from the adapter to the TV and switch the signal source on the TV to the appropriate mode HDMI 1 or HDMI 2. The image should appear instantly, automatically adjusting to the resolution of the TV screen.
| Connection type | Required equipment | Signal quality | Latency |
|---|---|---|---|
| HDMI cable | USB-C to HDMI adapter | Maximum (4K/60Hz) | None |
| Miracast | Smart TV or set-top box | High (depending on Wi-Fi) | Low (50-100 ms) |
| Chromecast | Built-in module or Dongle | Optimal for streaming | Minimal |
| DLNA | Local network | Depends on file | No (local playback) |
Broadcasting local files via DLNA server
If you have a collection of movies in MKV or AVI format on your smartphone that are not uploaded to online cinemas, the optimal solution will be technology DLNA. This standard allows you to transfer media files over a local network directly to the TV using its built-in media player.
To implement this scheme, you will need to install a server application on your smartphone, for example BubbleUPnP or VLC for Android. After launching the application, you need to select a video file in the device’s memory and click the “Play on device” button, selecting your TV from the list. In this case, the smartphone acts only as a control panel and data source.
The main advantage of DLNA is that video decoding occurs using the TV processor, not the smartphone. This allows you to watch heavy 4K movies without the risk of your phone overheating or quickly draining its battery while watching.
Why can’t the TV see files via DLNA?
Often the problem lies in the file format. If the video is encoded in a rare codec that your TV does not support, the file will be visible in the list, but will not play. In this case, installing a third-party player on the TV itself will help, for example, VLC or MX Player, if the TV platform allows it.
Third-party applications for screen duplication
In cases where standard Android tools do not find the TV or work incorrectly, you can use universal applications from the store Google Play. apps like Web Video Caster or Screen Mirroring - Smart View TV use their own algorithms to detect devices and stabilize the stream.
Some applications allow you to broadcast not only video, but also the entire system interface, which is convenient for demonstrating presentations or games. However, it is worth considering that free versions of such apps often contain advertising, and the picture quality may be limited in demo mode.
When choosing software, pay attention to the supported protocols: good applications work simultaneously with AirPlay (for compatibility with some TVs), Miracast and DLNA. This increases the chance of successfully connecting to any brand of TV, from old Sony to new Xiaomi.
⚠️ Warning: Avoid applications that require root access for basic screen casting. In 2026, most functions are available with standard user rights, and gaining root access may void the device's warranty.
☑️ Check before connecting
Solving problems with latency and sound quality
One of the most common complaints from users is desynchronization audio and video via wireless connection. The sound can lag behind the movements of the actors' lips for several seconds, making the viewing experience unbearable. Most often, the reason lies in an overloaded Wi-Fi channel or a weak signal from the router.
To fix the problem, try switching the router to the frequency 5 GHzif your devices support this range. It provides higher throughput and is less susceptible to interference from neighboring networks and household appliances compared to the classic 2.4 GHz frequency.
If the delay persists, check your TV settings. In some models Samsung i LG There is a special “Game mode” or a low latency mode for video input, which disables unnecessary image post-processing, speeding up the output of the image to the matrix.
Using a 5 GHz frequency for Wi-Fi connections critically reduces the latency when broadcasting high-resolution video and eliminates picture “freezes.”
Frequently asked questions (FAQ)
Why is there no sound when connected via HDMI?
By default, the smartphone can continue to output sound through its own speaker. Go to Android's audio settings, find the Sound Output or Audio Output section, and select your HDMI device. If there is no such item, try rebooting the phone with the cable already connected.
Is it possible to watch a movie from your phone on a TV without the Internet?
Yes, it is possible. For a wireless connection (Miracast), the Internet is not needed; devices connect directly via Wi-Fi Direct. For a wired connection via HDMI, the Internet is also not required. However, for online cinemas you will still need access to the network.
The video slows down during broadcasting, what should I do?
Reduce the playback quality in the application (for example, from 4K to 1080p). Bring your smartphone and router closer to each other. Close background applications on your phone that may be consuming traffic or CPU resources.
Does my phone support video output via USB?
Not all smartphones with a Type-C connector support video output. Typically, flagship models (Samsung S series, Huawei P/Mate series, Xiaomi flagships) have this function. Budget models often lack this hardware feature. Check the specifications on the manufacturer's official website.