Modern Smart TVs from the company LG provide users with ample opportunities for viewing multimedia content, however, control via a remote control is not always the most convenient solution, especially when it comes to searching for specific videos. Using a smartphone based on an operating system Android as a remote control or signal source greatly simplifies navigation and allows you to quickly find the videos you need using the familiar mobile application interface. The process of synchronizing devices is becoming a key skill for any owner of modern technology who wants to get the most out of their gadgets.
There are several proven methods that allow you to display the image from your phone screen on a large display, each of which has its own technical features and equipment requirements. The choice of a specific method depends on the software version webOSinstalled on your TV, as well as on the model of your smartphone and the quality of the wireless connection in the room. Understanding the differences between data transfer protocols will help you avoid typical connection errors and ensure stable operation of the streaming service without delays or signal interruptions.
In this guide, we will examine in detail all the current methods of integrating a mobile device with a television panel, paying special attention to network settings and connection security. You will learn how to properly prepare both devices for operation, what settings need to be checked first, and how to act in unusual situations when automatic detection does not work. Proper preparation of equipment is the key to successful and quick setup of the system for comfortable viewing of video.
Preparing equipment and checking network settings
The first and most critical stage is to ensure a single network environment for both devices, since most broadcast protocols, including Cast and AirPlay 2require finding gadgets on the same local subnet. You need to make sure that both your smartphone and TV are connected to the same Wi-Fi router, preferably using the same signal frequency for maximum stability. If your router supports dual-band mode, it is recommended to connect both devices to the network Android, and TV LG connected to the same Wi-Fi router, preferably using the same signal frequency for maximum stability. If your router supports dual-band mode, it is recommended to connect both devices to the network 5 GHzas this band provides the higher bandwidth needed to transmit a high-resolution video stream.
Check that the software on both devices is up to date, as outdated firmware versions may contain bugs that block device detection function on the local network. On your LG TV, go to the settings menu by selecting All settings → General → About TV → Check for updates, and install available packages if the system offers them. For a smartphone, go to the store Google Play and make sure that the application YouTube is updated to the latest version, since casting functionality often depends on the latest client software.
⚠️ Attention: If your router is configured to separate networks for guests (Guest Network) and the main network, make sure that both devices are connected to the main network, since the isolation of clients on the guest network often blocks the ability of the phone to detect the TV.
It is also worth paying attention to the firewall or anti-virus software settings on the router, which may incorrectly classify local broadcast data packets as suspicious activity. In rare cases, it is necessary to temporarily disable traffic filtering functions or add devices to the trusted list in order to allow the exchange of service packets to establish a handshake between gadgets. After completing these checks, you can proceed directly to the process of pairing devices.
☑️ Check before connecting
Method one: Using the built-in broadcast function
The simplest and most common connection method is implemented directly through the interface of the YouTube mobile application, using the built-in protocol Google Cast. This method does not require the installation of additional software and works on most modern LG TVs that support the webOS platform version 4.0 and higher. Open the YouTube application on your smartphone and find in the upper right corner of the screen a special icon in the form of a rectangle with signal waves, which indicates the broadcast function.
After clicking on this icon, the application will begin scanning the local network in search of available signal receivers, and after a few seconds your LG TV with the corresponding model name should be displayed in the list that appears. Select the desired device from the list, and the broadcast icon will change color, signaling a successful connection, after which any video running on the phone will begin to play on the TV screen. It is important to note that when using this method, the phone acts only as a control panel, and the video stream itself is downloaded by the TV directly from the Internet, which saves battery power on the smartphone.
If the TV is not displayed in the list, try restarting the YouTube application on the phone, completely closing it through the multitasking menu, and make sure that the YouTube application or the main Smart TV screen is open on the TV.
In some cases, the system may prompt for connection confirmation on the TV screen, especially if this is your first time pairing, so keep the remote handy to confirm the action. After successful authorization, you will be able to control playback, switch videos, adjust the volume and add videos to the playback queue directly from the smartphone screen. The functionality also allows you to create and manage playlists, which makes viewing content as flexible and convenient as possible for the whole family.
Method two: Connection via code on the TV screen
If automatic device detection does not work or you want to ensure a more secure connection, you can use the manual binding method using a digital code. This method is often required on older TV models or on complex networks where automatic detection protocols are blocked by the router's security settings. Open the YouTube application on your LG TV, go to the application settings section (usually a gear icon) and select Connect manually or Link with TV code.
A unique twelve-digit code will appear on the TV screen, which must be entered into the appropriate field in the mobile application on your Android smartphone. To do this, in the YouTube application on your phone, click on the broadcast icon, select the option Connect manually at the bottom of the menu and enter the displayed code in the input form that appears. After pressing the confirmation button, the devices will connect and you will have full control over playing content on the big screen.
| Option | Automatic connection | Connect by code |
|---|---|---|
| Speed settings | High (1 click) | Medium (data input) |
| Network requirements | Strict (one subnet) | Less strict |
| Security | Standard | Increased (verification) |
| Stability | Depends on the router | High |
Using the code ensures that you are connecting to yours TV, and not to a neighbor’s device, which is especially important in apartment buildings with dense buildings and many Wi-Fi networks. This method is also useful if the name of your TV is not displayed correctly on the network or contains special characters that interfere with the automatic identification of the gadget. After the initial setup by code, the devices often remember each other, and subsequent times the connection can occur automatically.
Third-party applications for screen duplication
In situations where standard tools do not work or you need to broadcast content not from the YouTube application, but directly from the smartphone desktop, specialized utilities come to the rescue. Applications like TV Cast for LG WebOS or AllConnect allow you to transfer video files, photos and even streaming video from browsers directly to your TV using alternative data compression and transfer algorithms. Such solutions often turn out to be a salvation for owners of older LG TV models that do not support the latest Google Cast protocols or have an outdated version of webOS.
The operating principle of most of these applications is to create your own media server on a smartphone, to which the TV is connected as a client, or to directly redirect the data stream through a local network. The user needs to install the selected application on the phone, launch it and follow the instructions to search for an available device on the network, after which they can select the type of content to stream. Some apps offer advanced settings, such as selecting image quality, subtitles or audio tracks, which may not be available in the standard interface.
⚠️ Attention: Third-party applications may contain built-in advertising or require the purchase of a premium version to remove restrictions on video length or picture quality, so carefully study the terms of use before installation.
It is worth considering that When using third-party solutions, the load on the smartphone processor increases, since the device is forced to encode the video stream in real time, which can lead to rapid battery drain and heating of the case. In addition, the picture quality may be slightly inferior to the native broadcast through the YouTube application due to the additional stage of signal transcoding. However, for viewing local video files or content from sites that do not have official support for Smart TV, this is the only working option.
Why might a third-party application not work?
Often the problem lies in the settings of the router's firewall, which blocks the ports used by third-party applications to transmit the media stream. Try changing your Wi-Fi security settings or temporarily disabling the packet filter.
Broadcasting the entire smartphone screen (Screen Mirroring)
The screen mirroring function, known as Screen Mirroring or Smart View on Samsung devices, allows you to display absolutely everything that happens on the display on the TV your smartphone, including menus, notifications and other applications. To activate this function on an LG TV, you need to go to the list of inputs and select the signal source Screen Share, after which the TV will go into connection standby mode. On your smartphone, you should open the quick settings panel by swiping from top to bottom and find a button called “Broadcast”, “Smart View” or “Screen mirroring”.
After activating the function, the phone will begin searching for available displays, and as soon as it detects your LG TV, just click on its name in the list to start synchronizing. The phone image will appear on the TV with a slight delay, which is normal for wireless video transmission technology without hardware encoding on the receiver side. This method is universal and allows you to display content from any application, including those that officially prohibit broadcasting via Chromecast due to copyright restrictions.
However, it is worth remembering that when mirroring the screen, the video is often played in the phone's orientation, which may be inconvenient for watching movies on a horizontal TV screen without rotating the smartphone itself. Additionally, any notifications you receive on your phone while you're watching will also appear on the big screen, so it's a good idea to turn on Do Not Disturb before starting your session. The image quality with this method greatly depends on the power of the phone's processor and the speed of the Wi-Fi connection, so this method may not be suitable for watching video in 4K.
Screen duplication (Mirroring) loads the smartphone more than regular broadcasting (Cast), since the phone itself encodes the video stream, and the TV only displays the finished picture.
Remedy problems and frequent connection errors
Despite the simplicity of the technology, users often encounter problems when the TV is not visible in the list of available devices or the connection is constantly interrupted while watching. One of the most common reasons is the use of different Wi-Fi frequencies when the phone is connected to the band 2.4 GHz, and the TV to 5 GHz, and the router is configured to isolate these networks from each other. In this case, you need to go into the router settings and make sure that network communication is allowed, or temporarily connect both devices to the same frequency.
Another common problem is the outdated YouTube application cache, which may contain erroneous data about network connections and interfere correct operation of the detection function. To solve this problem, go to the settings of your smartphone, find the YouTube application in the list of installed apps and select the option Clear the cachewithout deleting user data and logins. After clearing the cache, it is recommended to restart both devices - both the phone and the TV - to reset all network settings and start the connection procedure from scratch.
- 📡 Rebooting the router: Often, freezing of network equipment leads to the fact that device discovery packets are simply lost, and a simple reboot of the router solves the problem.
- 🔋 Power saving mode: Aggressive power saving settings on Android can turn off the Wi-Fi module in the background, interrupting the connection to the TV.
- 🛡️ Antivirus and firewall: Check whether the antivirus installed on your phone is blocking local connections by adding the YouTube application to the exceptions.
- 🔄 Firmware update: Make sure that the latest version of webOS is installed on the TV, as older versions may be incompatible with new Google protocols.
If none of The above methods did not help, perhaps the problem lies in hardware incompatibility or a malfunction of the Wi-Fi module of one of the devices. In such cases, you can try using a wired connection to the TV via an Ethernet cable, which will stabilize the network and eliminate wireless interference, leaving the phone connected via Wi-Fi. It is also worth checking whether the “AP Isolation” function (isolation of access points) is activated on the router, which is specifically designed to prohibit communication between devices within the local network.
⚠️ Attention: The menu interface of LG TVs may differ depending on the version of the webOS operating system (3.0, 4.0, 5.0, 6.0 and later), so the names of the items may vary slightly, but the logic of action remains the same.
Why is the video broadcast with a delay or low quality?
Delay and decreased quality are most often caused by low Internet speed or weak Wi-Fi signal. Try moving the router closer to the TV or switching to the 5 GHz band. Also, the quality may be automatically reduced by the YouTube service itself if the connection is unstable.
Is it possible to control the volume of the TV from your phone when broadcasting?
Yes, in most cases, the volume slider in the YouTube application on your phone controls the volume of the TV itself, not the smartphone. However, this depends on the TV model and firmware version.
What to do if the connection code does not appear on the TV?
Make sure that you are in the YouTube application on the TV, and not on the main screen or in another service. If the code does not appear, try reinstalling the YouTube application on the TV through the LG Content Store.
Does the broadcast work if the screen on the phone is turned off?
When using the Cast function (cast icon), the video will continue to play on the TV even when the phone screen is turned off, since the stream is direct. When mirroring the screen (Mirroring), the broadcast usually stops or the image freezes.