Modern LG TVs running the webOS operating system have become powerful multimedia centers, but the smartphone screen often remains the primary source of content. Streaming videos, photos, or even gameplay to the big screen allows you to share the experience with family or friends, creating a home theater atmosphere. This doesn't require complex cables, as wireless connection provides sufficient bandwidth for video transmission.
There are several proven methods for synchronizing devices, each with its own characteristics and suited to different use cases. Android smartphone owners can use built-in Miracast features, while iOS users rely on AirPlay 2 technology. Understanding the differences between these protocols will help avoid confusion during setup and ensure stable system operation in any situation.
Before you begin setup, it's crucial to ensure your router supports the 5GHz standard if you plan to stream heavy 4K video files. For stable 4K video transmission without buffering, the Wi-Fi connection speed should be at least 25-30 Mbps. Older routers that only operate on the 2.4 GHz band may not be able to handle high-quality streaming, resulting in lag or reduced image resolution.
Preparing equipment and network
The foundation of successful wireless streaming is a properly organized local network. Both devices—the smartphone and the LG TV—must be connected to the same Wi-Fi network. If you have a dual-band router, make sure the devices are connected to the same frequency, although modern routers often combine networks under a single name. Check the connection status on the TV by going to the menu. Settings → Network → Wi-Fi connection.
Make sure both devices are updated to the latest software version. Manufacturers regularly release patches to improve the stability of data transfer protocols. On LG TVs, the system update can be found at Settings → All settings → Support → Software updateOn smartphones, this process usually occurs through the system settings or app store.
Sometimes antivirus programs or router firewall settings can block local device detection. In such cases, you may need to temporarily weaken your protection or add devices to the trusted list. It's also worth checking whether AP Isolation mode is enabled in your router settings, which prevents devices within the network from seeing each other.
⚠️ Attention: If your router distributes two separate networks (for example, Home_2.4G and Home_5G), connect both devices strictly to one of them, otherwise they will not “see” each other.
Cast from Android via Screen Share (Miracast)
Miracast technology, implemented in LG TVs under the name Screen Share, is the de facto standard for Android devices. It allows you to mirror your smartphone's screen without the need for third-party apps. To get started, press the button on the LG remote control. Input or select an application Screen Share in the list of running programs.
On an Android smartphone, the procedure may have different names depending on the model and operating system version. Typically, it's called "Cast," "Smart View" (Samsung), or "Wireless Monitor." After searching for available devices, select your LG TV from the list. When connecting for the first time, a confirmation prompt may appear on the TV screen, which you'll need to accept using the remote.
☑️ Android Pre-Broadcast Check
Picture quality directly depends on the wireless channel load. If you experience artifacts or stuttering, try closing background apps on your phone that are consuming data. The Miracast protocol creates a direct Wi-Fi Direct connection, which minimizes latency but requires a strong signal.
Why does the sound disappear during broadcasting?
Sometimes, when connecting via Miracast, the audio may remain on the phone. Check the audio settings in the casting menu on your smartphone and ensure that output to an external device is selected. Also, some apps (such as Netflix) block audio when screencasting due to DRM restrictions, requiring you to use the built-in Cast button within the app.
Using AirPlay 2 for iPhone and iPad owners
Apple device owners can appreciate AirPlay 2 protocol support built directly into the webOS operating system. This eliminates the need for additional workarounds or third-party receivers. To activate the feature on an LG TV, go to Settings → Support → AirPlay and HomeKit and make sure the switch is in the "On" position.
To start casting, open Control Center on your iPhone (swipe down from the upper-right corner or swipe up on older models) and select "Screen Mirroring." Your TV will appear in the list of available devices. When pairing, a 4-digit code may appear on the TV screen; enter this code on your smartphone for security.
The advantage of AirPlay 2 is the ability to use your smartphone for other tasks while watching video. You can minimize an app, reply to a message, or check email, and the video streaming will not be interrupted. Multichannel audio is also supported, which is important for home theater systems.
LG ThinQ app and third-party solutions
The official LG ThinQ app turns your smartphone into a universal remote and media controller. After installation and pairing with your TV via Wi-Fi, you gain access to advanced control features. The app not only lets you stream photos and videos from your gallery but also controls content playback on the TV itself.
If built-in methods don't work or you require specific features, you can turn to third-party developers. Popular apps like TV Cast or Web Video Caster allow you to stream video from browsers that are typically protected from live streaming. They work using DLNA or a proprietary protocol, sending a link to the video stream directly to the TV.
| Connection method | Platform | Video quality | Latency |
|---|---|---|---|
| Screen Share (Miracast) | Android / Windows | High (up to 1080p/4K) | Low |
| AirPlay 2 | iOS / macOS | Very High (up to 4K HDR) | Minimum |
| DLNA / ThinQ | All platforms | Depends on the file | N/A (media only) |
| Google Cast | Android / iOS | High | Low |
When using third-party apps, be aware of ads in the free versions. They often force you to watch videos before starting a session. Paid versions typically offer a more stable connection and support for codecs that aren't natively supported.
Streaming via Google Chromecast built-in
Many modern LG Smart TV models have built-in Google Cast support (Chromecast built-in). This allows you to stream content from YouTube, Netflix, Google Photos, and other apps directly to your TV using your smartphone as a remote. Find the cast icon (a rectangle with waves) inside the app on your phone.
Unlike screen mirroring, in this case, the TV downloads the video stream from the internet using your Wi-Fi. This frees up the smartphone's processor and saves battery life. Picture quality is often higher in this case, as the TV decodes the video itself.
If the Cast button doesn't appear, make sure the apps on your phone and TV are up to date. Also, check that Google Play Services on your LG TV is enabled and working properly. Sometimes, rebooting the TV's Wi-Fi module is necessary for the Cast service to be detected.
Troubleshooting and diagnostics
Even a perfectly configured network can experience issues. If your TV isn't detecting your phone, try rebooting both devices. This is a classic but effective method for clearing the network service cache. It's also a good idea to reboot the router itself, as it may have exhausted its IP address pool or become frozen.
Buffering issues are often resolved by reducing video quality in the source app settings. If the router is located far away, the 5 GHz signal may be unstable, so it might be worth switching to 2.4 GHz, sacrificing maximum speed for connection stability. Check to see if the channel is congested with other devices.
⚠️ Note: WebOS menu interfaces may differ depending on the operating system version (3.0, 4.0, 5.0, 6.0, and later). The location of settings items may vary, so look for sections with similar meanings.
In some cases, resetting the network settings on your TV can help. Go to Settings → Network → Wi-Fi connection → Advanced Wi-Fi Settings and select "Edit" or "Forget Network," then reconnect by entering the password. This will refresh the device's network stack.
Frequently Asked Questions (FAQ)
Is it possible to connect a phone to an LG TV without Wi-Fi?
Yes, this is possible with a cable. For Android, you'll need USB-C to HDMI adapters that support the MHL or SlimPort protocol. For iPhone, you'll need a Lightning to Digital AV Adapter or, for newer models, a USB-C to HDMI adapter. However, in this case, TV control from your smartphone won't work; you'll only be able to transmit image and audio.
Why is there sound but no image when broadcasting a video?
Most often, this is a codec or DRM issue. If you're screencasting (Miracast/AirPlay), make sure your phone isn't in power-saving mode, which can block the GPU. If the issue is specific to a specific app (e.g., an online movie theater), try using the built-in Cast button within the app rather than screen mirroring.
How to eliminate image lag when playing games from a phone on a TV?
Input lag is inevitable with wireless transmission. For gaming, it's best to use a wired connection. If this isn't possible, enable Game Mode in your LG TV's picture settings. This will disable unnecessary image post-processing and reduce lag to a minimum.
The TV stopped detecting the phone after updating the router.
It's likely that AP Isolation is enabled by default on your new router, or the channel frequency has changed. Go to your router settings and make sure devices are allowed to communicate with each other on the local network. You can also try manually setting a static IP address for your TV.