Modern smartphones have become powerful multimedia centers, but even the most advanced models have screens that are smaller than full-size televisions. Users often need to show a family album, presentation, or movie on the big screen, and wireless technologies make this possible instantly. Wi-Fi networks for transmitting video streams, it provides high-quality images without unnecessary wires, turning an ordinary vacation into a cinema.
Owners iPhone Apple's ecosystem and AirPlay technology, which is built into most modern Smart TVs, offer a particularly advantageous experience. However, if your TV doesn't support Apple's native protocol, there are alternative methods that require installing third-party apps or using media servers. In this article, we'll cover all the current methods in detail, from built-in tools to specialized software, so you can choose the best option.
Streaming quality directly depends on the stability of your router and channel bandwidth. Before starting setup, make sure both devices are connected to the same network, as this is fundamental condition for gadgets to discover each other. Ignoring this rule is the most common reason why a smartphone "doesn't detect" a TV, even if all the settings seem correct.
Using AirPlay technology for broadcasting
The easiest and most reliable way to transfer video is to use the built-in protocol AirPlay 2This technology was developed by Apple and allows for high-definition content to be streamed with minimal latency. Many TV manufacturers, such as Samsung, LG, Sony, and Vizio, have already built AirPlay 2 support into their latest models, eliminating the need to buy additional set-top boxes.
To start broadcasting, you don't need to install any additional apps. Simply open the video in the default Photos app or any video player that supports this protocol. A rectangle with a triangle at the bottom will appear on the screen, indicating the broadcast function. Clicking it will display a list of available devices on your local network.
If the TV requires a verification code, it will appear on the TV screen, and you'll need to enter it on your iPhone. This is a security measure to prevent unauthorized access to your screen. Once paired successfully, the video will begin playing on the big screen, and your smartphone can be used as a remote control or for other tasks.
- 📺 Make sure AirPlay support is enabled on your TV in the network settings.
- 📶 Make sure your iPhone and TV are connected to the same Wi-Fi frequency (2.4 GHz or 5 GHz).
- 🔒 When prompted for a password, use the code displayed on the TV screen.
- 🔄 Update your TV firmware to the latest version for stable protocol operation.
⚠️ Please note: Using AirPlay in Screen Mirroring mode drains your iPhone's battery significantly faster than streaming video from apps because the processor is actively encoding the image in real time.
It's worth noting the difference between streaming from an app and screen mirroring. In the former, the phone only sends a link to the content, and the TV downloads it from the internet, saving battery life. In the latter, the phone encodes each image and sends it as a video stream, which requires more resources.
Broadcasting via Smart TV manufacturer apps
If your TV doesn't directly support AirPlay, manufacturers often offer their own solutions for integrating with mobile devices. Major brands develop specialized apps that turn your smartphone into a universal remote and media controller. This allows you to not only display video but also manage content, text input, and settings.
For TVs Samsung You need the SmartThings app, which automatically detects devices on the network. Once a device is added to the list, the Smart View feature allows you to mirror the image from your iPhone's screen. Similarly, for LG The LG ThinQ application is intended for Sony - Video & TV SideView or simply use the built-in Chromecast.
☑️ Checking connection readiness
The setup process usually takes no more than a couple of minutes. After installing the app from the App Store, launch it and follow the on-screen instructions. You'll be asked to confirm the pairing, possibly by pressing a button on the TV remote or entering a PIN. Some apps require you to create a manufacturer account, which is standard procedure for expanding functionality.
It's important to understand that streaming quality through third-party apps may vary. It depends on the app's optimization and the smartphone's processor load. If you notice audio and video out of sync, try closing background apps on your iPhone or restarting your router.
| Brand TV | Application name | AirPlay support | Peculiarities |
|---|---|---|---|
| Samsung | SmartThings | Yes (2019+ models) | Full control of your smart home |
| LG | LG ThinQ | Yes (WebOS 4.0+) | User-friendly remote control interface |
| Sony | Video & TV SideView | No (uses Chromecast) | Integration with Google services |
| Philips | Philips TV Remote | Depends on the model | Android TV support |
Using DLNA and media servers
Technology DLNA (Digital Living Network Alliance) is a universal standard for sharing media within a home network. Unlike AirPlay, it doesn't require a strict ecosystem and works on virtually any Smart TV. iPhones, which don't have built-in DLNA support in their gallery, require third-party client apps.
One of the popular solutions is the application VLC for Mobile or InfuseThese players can find DLNA servers online. If your TV supports DLNA rendering, you can play a video file in an app on your phone and select the TV as the output device. It's also possible to have the TV act as a server and the phone read content from it, but we're interested in the opposite scenario.
A more complex but flexible approach is to create a media server on a computer or NAS connected to a TV and control playback from an iPhone. However, for the simple task of "showing a video from a phone," it's enough for an iPhone app to be able to stream via the DLNA/UPnP protocol. Many file managers, such as Documents by Readdle, have a built-in "Cast" function that uses these protocols.
⚠️ Note: TV interfaces and menu item names may vary depending on the firmware version and region. If you don't see the DLNA or "Media Server" option, check the official documentation for your model.
Why might video lag when using DLNA?
The DLNA protocol doesn't always manage buffering effectively. If the video file has a high bitrate (for example, 4K HDR) and the Wi-Fi speed is unstable, buffering pauses may occur. Unlike AirPlay, DLNA often relies on the TV's own file format decoding capabilities.
The advantage of this method is its omnivorous nature: it supports a huge number of video file formats that may not be played natively by the TV. In this case, the phone acts as a powerful decoder, converting the stream into a format understandable to the TV.
Using broadcast applications (Cast services)
When native methods fail, universal translator apps, often called "casters," come to the rescue. Examples include Cast to TV, Screen Mirroring** and similar programs. These programs create a virtual driver on your phone that captures your screen image and sends it to your TV via a local network or directly via Wi-Fi Direct.
They work by emulating a signal that the TV perceives as a request from a compatible device. You need to download such an app from the App Store, run a network scan, and select your TV from the list. Often, you'll need to press the "Connect" button on the TV remote or confirm the on-screen request.
It's worth keeping in mind that free versions of these apps often contain ads, which can block part of the screen or interrupt browsing. Paid versions are free of these restrictions and offer a more stable connection. Furthermore, some apps can introduce additional lag, making them unsuitable for fast-paced games but perfectly suitable for viewing photos and videos.
- 📲 Download a trusted caster app (for example, Replica or TV Cast).
- 🔍 Run a network scan in the app.
- 📺 Select your TV from the list of found devices.
- ▶️ Open the video file using the file manager within the app.
An important aspect is the resolution of the transmitted image. In the streaming app settings, you can often select the quality: 720p, 1080p, or 4K. Setting the resolution too high on a weak Wi-Fi signal will result in constant buffering, so it's recommended to start with 720p or 1080p.
Broadcasting from browsers and streaming services
Streaming content from browsers (Safari, Chrome) and streaming platforms (YouTube, Netflix, online cinemas) deserves special attention. In most cases, a mechanism similar to AirPlay or Chromecast works here. For example, the Safari browser on iPhone has an AirPlay button in the Control Center that allows you to stream an entire browser tab.
Streaming services have a built-in "Cast" button (a screen icon with waves). By clicking it, you command the TV to automatically play the stream from the link. This is the highest-quality method, as the video doesn't go through your phone; it's downloaded directly from the internet by the TV in the highest available quality.
If you're watching a video on a website that doesn't have a built-in "Cast" button, you can try the "Cast" feature in iOS's Control Center. This will mirror your Safari tab to your TV screen. However, some websites block the casting of protected content (DRM), and you'll see a black screen with audio instead of video. This is a security limitation that can't be circumvented using standard methods.
In the case of YouTubeThe process is incredibly simple. Just tap the cast icon in the YouTube app on your iPhone and select your TV. The video will switch to the big screen, and your phone will act as a remote. This works even if your phone's battery is low or in sleep mode, as playback is handled by the TV.
Solution and connection optimization
Even with proper setup, problems may still occur: the TV isn't visible, the video is slow, or the sound is lost. Most often, the cause lies in the router settings. Make sure AP Isolation is disabled on the router, which prevents devices on the same network from seeing each other. It's also worth checking whether multicast traffic is blocked.
If the connection is unstable, try rebooting the router and all devices. Sometimes, forgetting the Wi-Fi network on your iPhone and reconnecting helps. For owners of dual-band routers, it's important that both the phone and TV are connected to the same frequency (preferably 5 GHz), although modern routers can correctly route traffic between bands.
If nothing helps, you can reset the network settings on your iPhone (Settings → General → Transfer or reset iPhone → Reset → Reset Network Settings). This won't delete your data, but it will reset your network settings to factory defaults, which often solves device detection issues.
Why doesn't the TV detect the iPhone when Wi-Fi is on?
Most often, the devices are on different subnets or client isolation is enabled on the router. Also, check if you're using a guest Wi-Fi network for one of the devices—guest networks typically prohibit data exchange between clients.
Is it possible to output video via Wi-Fi Direct without a router?
Yes, some TVs and apps support Wi-Fi Direct. This connects your phone directly to the TV's signal, bypassing your home router. However, the speed and stability of this connection may be lower.
How can I improve image quality if my video is choppy?
Reduce the broadcast resolution in the app settings, move your phone closer to the router, disable downloads on other devices on the network, or switch to the 5 GHz frequency.
Does the broadcast work if there is no internet on the phone?
Yes, to transmit video over a local network (DLNA, AirPlay locally), the Internet is not required; you only need a working local Wi-Fi network between the router and the devices.
So, there are many ways to turn your iPhone into a powerful content source for the big screen. Choose a method based on your TV's capabilities: native AirPlay will provide the best experience, DLNA will ensure compatibility with older models, and caster apps will serve as a universal backup.