Synchronization Android smartphone with TV opens up new opportunities for viewing content, playing games and managing devices. However, many users encounter problems ranging from no sound to constant connection dropouts. In this article we will analyze all the current connection methods - from the classic HDMIcable to wireless technologies Miracast i Google Cast, and also give recommendations for optimizing the connection for different use scenarios.

It is important to understand that the choice of method depends not only on the TV model (Samsung, LG, Sony Bravia etc.), but also on the version Android on the smartphone. For example, old devices with Android 8.0 may not support Wi-Fi Direct, and TVs without Smart TV will require additional adapters. We took these nuances into account and prepared instructions for all cases.

1. Connection via HDMI: reliability without delays

The most stable synchronization method is using HDMI cable with a smartphone adapter (usually USB-C/HDMI or Micro-USB/HDMI). This method guarantees minimal latency (important for games) and supports resolutions up to 4K@60Hz on modern devices. However, there are nuances:

  • 🔌 Type adapter: For Samsung Galaxy S23 you need an adapter with support DisplayPort Alt Mode, and for older models (Xiaomi Redmi Note 8) — MHL-adapter.
  • 📺 HDMI port on TV: Make sure you use the port marked ARC or HDMI 2.0 for audio transmission.
  • ⚡ Power: Some adapters require additional power via USB (use a hub with a port USB-PD).

Instructions:

  1. Connect the adapter to your smartphone, and the cable HDMI to the TV.
  2. On the TV, select the signal source (INPUT or SOURCE) - usually this HDMI 1/2.
  3. A notification about connecting to an external display may appear on your smartphone. Select the mode Duplicate screen or Expand screen.
⚠️ Attention: On some TVs Sony 2019–2020, when connected via HDMI there may be no sound. Solution: in the sound settings of your smartphone, select HDMI as the output device.

Support for HDMI output by your smartphone (check in the specifications)

The presence of an adapter with the correct connector (USB-C/Micro-USB)

A free HDMI port on the TV with ARC support (for sound)

Smartphone charge >50% (adapters consume a lot of energy)-->

2. Wireless transmission via Wi-Fi: Miracast and Google Cast

For wireless synchronization, two main protocols are used: Miracast (built into Android starting from version 4.2) and Google Cast (requires Chromecast or built-in support on TV). Let's look at both options.

2.1. miracle ~100–200 ms (not suitable for dynamic games).

Miracast allows you to broadcast your smartphone screen to your TV via Wi-Fi Direct, but has limitations:

  • 📶 Maximum resolution - 1080p (on some TVs - 720p).
  • 🎮 Latency ~100–200 ms (not suitable for fast-paced games).
  • 🔋 Quick drain of the smartphone battery.

How to connect:

  1. On the TV, activate Screen Mirroring (on Samsung — Smart View, on LG — Miracast).
  2. On your smartphone, open Settings → Connected devices → Screen sharing (on Xiaomi — Cast).
  3. Select your TV from the list of available devices.

2.2. Google Cast: streaming content

Unlike Miracast, Google Cast it does not transmit the entire screen, but only content from supported applications (YouTube, Netflix, Google PhotosAdvantages:

  • 🎬 Support 4K HDR (if TV and application allow).
  • 🔄 Low latency (~50 ms) with good Wi-Fi.
  • 📱 The smartphone can be used for other tasks during the broadcast.

Instructions:

  1. Make sure that the smartphone and TV are connected to the same network Wi-Fi.
  2. On the TV, turn on the mode Cast (on Android TV - icon in the upper right corner).
  3. In the application (for example, YouTube) press the icon Cast and select your TV.
⚠️ Attention: On TVs Tizen (for example, Samsung QLED 2021) installation is required for Google Cast applications Google Home and setting up the device as Chromecast built-in.

Via HDMI

Miracast (screen duplication)

Google Cast (YouTube, Netflix)

I don’t connect the smartphone to the TV-->

3. Using specialized applications

If the built-in functions do not work or you need additional features (for example, broadcasting games), third-party applications will help. We tested 5 of the most reliable solutions:

Application Supported protocols Features Cons
ApowerMirror Miracast, Wi-Fi Direct Screen recording, annotations, low latency (~80 ms) Paid version for 1080p
TeamViewer QuickSupport Wi-Fi/mobile data Remote control of TV from a smartphone Requires installation on both devices
LocalCast DLNA, Chromecast Broadcasting local files (video, photo) Advertising in the free version
Steam Link Wi-Fi 5 GHz Streaming games from PC to TV via smartphone Requires a powerful router

For games we recommend Steam Link or Moonlight (for NVIDIA GameStream). These applications allow you to stream games from a PC to a TV via a smartphone as an intermediary, but require:

  • 🖥️ A computer with a video card NVIDIA (for Moonlight) or an installed Steam.
  • 🌐 Router with support Wi-Fi 5 GHz (minimum delay).
  • 🎮 Gamepad connected to a smartphone via Bluetooth.
How to reduce the delay in games?

1. Connect the router to the TV via cable (if possible).

2. In the router settings, enable QoS (traffic priority for smartphone).

3. Use modes Gaming or Low Latency in the application (for example, in Moonlight).

4. Close all background applications on your smartphone.

4. Solving common problems

Even with proper configuration, users encounter common errors. We have collected solutions for the most common cases:

4.1. No sound when connected

Causes and solutions:

  • 🔇 HDMI: In the sound settings of the smartphone (Settings → Sound → Output device), select HDMI.
  • 📶 Miracast: On some TVs (LG OLED C1) sound is transmitted separately - turn on Audio Return Channel (ARC) in the HDMI settings.
  • 🎵 Google Cast: Check whether the application supports audio broadcasting (for example, Spotify blocks output to Chromecast in free version).

4.2. Image delay (lag)

Critical delay (>200 ms) makes it impossible to watch videos and games. Main reasons:

  • 📶 Weak signal Wi-Fi: switch to band 5 GHz or use a cable.
  • 📱 Background processes: close all applications on your smartphone through Settings → Applications → Running.
  • 🖥️ Low TV performance: on older models (Samsung Series 5 2016), turn on the mode Game in the image settings.

4.3. The TV does not find the smartphone

The problem is typical for Miracast i Wi-Fi Direct. Check:

  • 🔄 Reboot both devices.
  • 📋 Update the TV firmware (Settings → Support → Software update).
  • 🛡️ Disable VPN on your smartphone (may block local connection).
⚠️ Attention: On TVs Philips s Android TV 9.0 sometimes settings are reset Miracast after the update. Solution: reset the TV's network settings via Settings → Network → Reset.
💡

If the TV does not support Miracast, but has a USB port, try connecting Amazon Fire TV Stick or Xiaomi Mi TV Stick —they will add support for wireless broadcasting.

5. Optimizing the connection for different scenarios

The quality of synchronization depends on the purpose of use. We have prepared recommendations for three popular scenarios:

5.1. Watching movies and TV series

The priority is stability and picture quality. Optimal settings:

  • 📺 Use Google Cast (via Netflix, KinoPoisk or YouTube).
  • 🌐 Connect the TV to the router with a cable (Ethernet), and the smartphone to Wi-Fi 5 GHz.
  • 🔧 In the router settings, enable QoS and set priority for traffic Chromecast.

5.2. Games (including cloud games)

Minimum latency is critical here. data-i="213">🎮 For local games:

  • 🎮 For local games: HDMI cable with adapter (latency ~10 ms).
  • ☁️ For cloud services (Xbox Cloud Gaming, GeForce NOW): Moonlight or Steam Link by Wi-Fi 6.
  • 📡 Place the router closer to the TV or use Mesh system.

5.3. Presentations and working with documents

Screen duplication without cropping is important. options:

  • 🖥️ Miracast with resolution setting 1920×1080 (on Screen settings → Resolution on a smartphone).
  • 📎 For PowerPoint: use Microsoft PowerPoint with the function Present on TV.
  • 🔄 Check the aspect ratio: on some TVs (Sony KD-55X80J) may require manual adjustment of the scale.
💡

For cloud games, not only Wi-Fi is critical, but also the speed of the Internet connection: the minimum requirements are 25 Mbit/s for 1080p and 50 Mbit/s for 4K.

6. Alternative methods: DLNA and USB

If none of the above methods are suitable, consider alternatives:

6.1. DLNA: broadcasting media files

DLNA allows you to transfer videos, photos and music from your smartphone to your TV without duplicating the screen. Supported by most Smart TV and applications (for example, VLC).

How to set up:

  1. On your TV, turn on DLNA (Settings → Network → DLNA Server).
  2. On your smartphone, install application BubbleUPnP or LocalCast.
  3. Select a file and press Play on TV.

6.2. USB connection

If the TV supports USB-OTG, you can play media files directly from your smartphone:

  • 🔌 Use a cable USB-C/USB-A (or an adapter for Micro-USB).
  • 📁 The TV will detect your smartphone as a flash drive - select files through the built-in media player.
  • ⚠️ Not all TVs support formats MKV or FLAC —conversion may be required.
⚠️ Attention: Connecting via USB does not transfer the smartphone screen - only files to duplicate the screen.

7. synchronization methods: what to choose?

To make the choice easier, we have compiled a comparison table for key parameters:

Method Latency Max resolution Required. Internet Suitable for
HDMI ~10 ms 4K@60Hz ❌ No Games, high quality videos
Miracast 100–200 ms 1080p ❌ No Presentations, viewing photos
Google Cast 50–150 ms 4K HDR ✅ Yes (Wi-Fi) Streaming video, music
DLNA — Depends on TV ✅ Yes (local network) Playing media files
USB — Depends on TV ❌ No Viewing photos/videos without broadcasting

For most users, the optimal solution will be a combination of methods:

  • 🎮 Games: HDMI or Steam Link by Wi-Fi 6.
  • 🎬 Movies: Google Cast via Netflix or Kodi.
  • 📊 Presentations: Miracast with manual resolution setting.

FAQ: Answers to frequently asked questions

Is it possible to synchronize Android with a TV without Smart TV?

Yes, but you will need additional equipment:

  • 📦 Chromecast or Fire TV Stick (connect to HDMIport).
  • 🖥️ Set-top box (Apple TV, NVIDIA Shield) with support Miracast or AirPlay.
  • 🔌 Adapter HDMI-to-AV for older TVs (the quality will be lower).

The minimum cost of the solution is from 2,000 ₽ (Xiaomi Mi TV Stick).

Why does the video slow down when connected via Wi-Fi?

Reasons and solutions:

  • 📶 Weak signal: Move the router closer to the TV or use Wi-Fi repeater.
  • 📱 Network overload: Disconnect other devices from Wi-Fi or turn on QoS on the router.
  • 🖥️ Poor TV performance: In the video settings select 720p instead of 1080p.
  • 🔄 Problems with the codec: Convert video to H.264 (for example, via HandBrake).
How to cast an Android screen to a TV with iOS (Apple TV)? summary>

For this:

  1. Install the application on your smartphone AirScreen or ApowerMirror.
  2. On Apple TV turn on AirPlay (Settings → AirPlay and HomeKit).
  3. In the application on your smartphone select Apple TV as an output device.

The delay will be ~150–200 ms (not suitable for games).

Can I control the TV from a smartphone?

Yes, for this:

  • 📱 Install the official brand application:
    • Samsung SmartThings for Samsung TV;
    • LG ThinQ for LG TV;
    • TV SideView for Sony Bravia.
  • 🎮 For universal control, use Google TV or Yatse (requires setting IP addresses TV).

Functions: switching channels, adjusting volume, launching applications.

Why doesn’t sound work when connected via HDMI?

Possible reasons:

  • 🔇 The smartphone is not selected HDMI as a sound output device (Settings → Sound → Output device).
  • 🔌 A faulty cable or adapter is used (try another one).
  • 📺 Disabled on the TV ARC (enable it in the settings HDMI-port).
  • 🔄 Reboot both devices.

If the problem persists, check support HDMI-CEC on your TV.