Modern Android TV turns an ordinary TV into a powerful multimedia center, but often the smartphone screen contains content that you want to see on a larger scale. Whether it's a family photo album, a presentation for colleagues, or a mobile game that requires a lot of review, image transfer is becoming a sought-after feature. Fortunately, the Android ecosystem offers many built-in and third-party tools to solve this problem without the need to buy complex additional equipment.
In this article we will look in detail at how to Broadcast the screen phone to TV using various methods: from wireless protocols to physical cable connection. You will learn about the nuances of the work of the standards Miracast i Google Cast, understand why sound delay sometimes occurs, and get answers to common questions about setup. Regardless of what smartphone you have - a flagship or a budget model - you will find a working way to display a picture.
Preparing devices for a wireless connection
Before trying to connect gadgets, you need to make sure that they are in the correct network environment. The basic operating principle of most wireless media transfer protocols is the presence of a single local network. This means that both your smartphone and the TV with the operating system Android TV must be connected to the same Wi-Fi router.
A common mistake users make is connecting the phone to the 4G/5G mobile data, while the TV works via Wi-Fi. In this case, the devices simply “do not see” each other on the local network. It's also worth checking that your TV has device discovery enabled, which can sometimes be disabled by default for privacy reasons.
Pay attention to the wireless network frequency. If your router supports dual-band mode, it is better to use the network 5 GHz to transmit high-definition video. This will provide higher throughput and reduce the likelihood of artifacts or image stuttering during broadcast.
- 📶 Make sure that both devices are connected to the same Wi-Fi network (not the Guest network).
- 📱 Check that the "Power Saving" mode is disabled on your smartphone, which can limit operation of the Wi-Fi module.
- 📺 Update the TV firmware to the latest version through the menu
Settings → About TV → System update.
⚠️ Attention: If you are using a guest Wi-Fi network or a corporate network with Client Isolation, devices will not be able to exchange data with each other, even if they are on the same network.
Google Cast technology (Chromecast built-in)
The most common and convenient way to transfer content to Android TVs is to use technology Google Cast. It is built directly into the TV operating system, so no additional receivers are required. This method is ideal for streaming video from popular applications such as YouTube, Netflix or Google Photos.
The principle of operation is different from simple screen mirroring. When you press the broadcast button in the application, the smartphone only sends a link to the video stream to the TV, and the TV itself downloads and plays the content directly from the Internet. This significantly saves phone battery power and relieves the processor, since the device does not encode the video signal in real time.
To start broadcasting, find a special icon in the application interface in the form of a rectangle with waves in the corner. After clicking, the system will prompt you to select an available device. If your TV is not shown in the list, make sure that the latest services are installed on your smartphone. Google Play Services.
If the Cast icon does not appear in the application, try closing it completely through the multitasking menu and launching it again, after making sure that Wi-Fi is active.
It is important to understand the difference between transferring a specific media file and duplicating the entire interface. Google Cast does an excellent job with the first, but for the second (for example, to show the desktop or a game), you will need to use the “Screen Cast” function, which will be discussed in the next section.
| Parameter | Google Cast (Media) | Screen Cast (Mirror) |
|---|---|---|
| Load to phone | Minimum | High |
| Battery consumption | Low | High |
| Picture quality | Up to 4K HDR (depending on content) | Depends on Wi-Fi speed |
| Sound | Plays on TV | Plays on TV |
Screen mirroring via Miracast and Smart View
When it is necessary to show on the big screen exactly what is happening on the smartphone display in real time (settings menu, browser, games), mirroring technology is used. In the Android environment, it is based on the standard Miracast, although manufacturers often give it their own names.
On Samsung smartphones this function is called Smart View, on Xiaomi - Broadcast or Cast, on devices with pure Android - Screen cast. To activate, simply lower the notification shade and find the corresponding icon. After scanning the network, the phone will find your Android TV and offer to connect.
Unlike Google Cast, when using Miracast, the video stream is encoded by the phone's processor and transmitted via Wi-Fi Direct. This means that even if the Internet on the router disappears, the connection between the phone and the TV will remain, since they create a direct connection.
☑️ Check before connecting Miracast
It is worth considering that this method is sensitive to interference. If there are a lot of neighbor networks on the air or the wall between rooms is too thick, you may notice sound and video desynchronization. In such cases, it is recommended to bring the smartphone closer to the TV or router.
⚠️ Attention: When duplicating the screen, the image format may not match the proportions of the TV, which is why black bars will appear at the edges. This is normal system behavior that preserves the original resolution of the smartphone.
Using third-party applications
If the built-in tools do not work correctly or your TV is an old generation of Android TV, specialized applications from the store come to the rescue. Google Play. They often have more flexible codec and buffering settings, which improves connection stability.
A popular solution is the application AirScreen or TV Cast. They are installed directly on the TV and emulate the reception of signals from various protocols, including AirPlay (for iPhone) and advanced versions of Miracast. After installing the application on your TV, you need to launch it and follow the instructions on the screen to pair with your smartphone.
Some applications allow you to transfer not only the screen, but also individual media files via the protocol DLNA. In this case, you use the file manager on your phone, select a video or photo, click "Send" and select the TV as the playback target.
Why might third-party apps work better?
Built-in system services are sometimes limited by the TV manufacturer to save resources. Third-party applications can use their own video compression algorithms, which reduces network load and reduces latency.
When choosing an application, pay attention to the presence of advertising, as many free versions broadcast advertising videos directly to the TV screen while connected. Paid versions usually do not have this drawback and offer support for higher bitrates.
Wired connection via HDMI adapter
For those for whom stability and absence of delays are critical (for example, for playing games or watching videos at the maximum bitrate), wireless methods may not be suitable. In this case, the only correct solution is a wired connection via the port HDMI.
Since modern smartphones do not have a full-size HDMI output, you must use a special adapter. For phones with a USB Type-C port, you will need an adapter USB-C to HDMI. It is important to check whether your specific smartphone supports video output via USB, since budget models often lack this function (MHL technology or DisplayPort Alt Mode).
The connection process is as simple as possible: insert the adapter into the phone's charging connector, connect the HDMI cable from the adapter to a free port on the TV and switch the signal source on the TV using the remote control to the appropriate mode (for example, HDMI 1). The image will appear instantly without the need for network setup.
- 🔌 Use high-quality HDMI cables version 2.0 or higher to support 4K resolution.
- 🔋 Remember that with a wired connection, the phone may quickly discharge, so it is better to use an adapter with an additional charging port (PD).
- 🎮 This method provides minimal Input Lag, making it ideal for mobile games on a large screen.
⚠️ Note: Not all phones with a Type-C connector support video output. Before purchasing an adapter, check the specifications of your model on the manufacturer's official website, looking for support for the standard DisplayPort or HDMI Alt Mode.
A wired connection is the only way to guarantee image transmission without compression and delays, regardless of the quality of your Wi-Fi network.
Problem solving and troubleshooting
Despite proven technologies, users often encounter a situation where the TV does not see the phone or the connection is constantly disconnected. The first step is to restart both devices. This simple action resets network caches and discovery services that may have hung.
If the problem persists, check your firewall settings on your router. Sometimes parental controls or guest mode features block local traffic between devices (AP Isolation). Disabling this feature in the router settings usually solves the visibility problem.
It is also worth paying attention to the date and time on devices. If the clocks on your phone and TV are out of sync by more than a few minutes, security protocols may prevent a secure connection from being established to transfer content.
Path to check the date on Android TV:
Settings → Device → Date and time → Automatic time correction
In rare cases In cases, the conflict may be caused by a VPN application installed on the phone. It redirects all traffic through a remote server, making the device invisible to the local network. Try temporarily disabling the VPN before trying to connect.
Why is there no sound on the TV when broadcasting?
Most often the problem lies in the settings of a specific application. Some video players output audio through your phone's speaker by default. Check the audio settings inside the application or use the system screen mirroring function, which forcibly transmits both audio and video.
Is it possible to transmit an image if there is no Wi-Fi router?
Yes, you can. Use the Hotspot feature on your smartphone. Turn on the Internet distribution, connect the TV to the created Wi-Fi network, and then try to start the broadcast. In this case, a router is not needed, communication goes directly between devices.
The video slows down during wireless broadcasting, what should I do?
Reduce the playback quality in the source application (for example, from 4K to 1080p). Make sure that the phone is not in a case that is blocking the signal, and bring it closer to the TV. Also close background applications on your smartphone that consume Internet traffic.
Does my budget smartphone support TV output?
Almost all Android smartphones support wireless broadcasting (Miracast/Google Cast). However, support for wired output via HDMI is only available on models in the mid- and high-price segment. Check the characteristics of the processor and USB port of your model.
How to stop broadcasting?
To stop, just click on the broadcast icon again in the notification shade or in the application and select “Disable” or “Stop broadcasting.” On some TVs, you can also press the “Back” or “Home” button on the remote control, which will interrupt the session.