How to connect a smartphone to an Android TV set-top box: 5 ways + FAQ

Connecting a smartphone to Android TV set-top box opens up a lot of possibilities: from viewing photos on the big screen to controlling the console as a remote control or streaming games. But not everyone knows that there are several connection options - and each is suitable for different tasks. For example, Mi Box S or NVIDIA Shield support wireless protocols, and older models may require a cable connection.

In this article we will analyze all the current methods - from classic HDMI to modern technologies like Google Cast i Miracast. We will pay attention to typical errors (for example, why the phone screen is not duplicated) and give advice on optimizing the connection for games or video in 4K. If you want not just to broadcast content, but to use your phone as a full-fledged remote control or even a game controller, you will find instructions for this here too.

Important: some methods require root access or special applications, but we have noted such cases separately. Most methods work on standard firmware Android 10+ and do not require deep technical knowledge.

1. Connection via HDMI (for phones with video output support)

The most stable method is a physical connection via HDMI. It guarantees minimal latency and supports resolutions up to 4K@60Hz, which is critical for gaming or watching movies. However, not all smartphones are equipped with a connector. data-i="54">or HDMI - most often it replaces USB-C with support DisplayPort Alt Mode.

You will need:

🔌 Adapter USB-C → HDMI (For example, Google USB-C to HDMI or Anker 810).
📺 HDMI cable (usually included with the set-top box).
🔋 Power supply for the phone (if used for a long time).

Step-by-step guide:

Connect the adapter to USB-C port of the smartphone.
Connect the adapter to HDMIport of the set-top box or TV (if the set-top box supports pass-through).
On the phone, select the image transmission mode: Settings → Display → Wireless/wired display.
If the screen does not appear, restart both devices.

The phone's USB-C port supports DisplayPort Alt Mode|

The adapter is compatible with your smartphone model|

The set-top box is turned on in the "External Source" mode (Source)|

HDMI cable version 2.0 or higher (for 4K)

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Advantages method: no lag, supports high resolutions, does not require Wi-Fi. Disadvantages: the phone runs out faster, additional accessories are needed.

💡

If the image on the TV screen is cropped, try changing the aspect ratio in the phone display settings (Settings → Display → Image scale).

2. Wireless broadcast via Wi-Fi (Miracast, Google Cast)

For most modern set-top boxes (Xiaomi Mi Box, NVIDIA Shield, Mecool) wireless screen broadcasting is available via protocols Miracast or Google Cast. The first duplicates the phone screen 1:1, the second allows you to stream only content (for example, video from YouTube or Netflix).

How to enable:

Make sure that the phone and set-top box are connected to the same Wi-Fi network.
On the set-top box activate the receiving mode:
- For Miracast: Settings → Display and sound → Wireless display.
- For Google Cast: open the application Google Home and select your set-top box.

On the phone:

For Android 10+: swipe down the notification panel → Broadcast or Wireless Display.
For Samsung: Settings → Connections → Smart View.

What is the difference between Miracast and Google Cast?

Miracast duplicates the entire phone screen (as via HDMI), but via Wi-Fi. Supported by most Android devices, but can slow down under high loads. Google Cast broadcasts only content from the supported ones. applications (YouTube, Netflix, Spotify). Delays are minimal, but the phone screen is not duplicated - the set-top box works like a player.

Typical problems and solutions:

❌ The set-top box is not visible in the list of devices: check whether the mode is turned on Wireless Display on the set-top box and whether the Wi-Fi networks match.
❌ Lags during broadcasting: switch the router to the frequency 5 GHz or reduce the broadcast resolution in the settings.
❌ No sound: in the broadcast settings, select Transfer sound to TV.

Miracast (screen mirroring)|

Google Cast (content only)|

I don’t know what it is|

I don’t use wireless broadcasting

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3. Connection via USB (MHL or OTG)

If your set-top box has USB port, you can try connecting via USB-OTG or MHL (Mobile High-Definition Link). This method is less popular than HDMI or Wi-Fi, but can help out if other methods are not available.

What you need:

🔌 Cable USB-C → USB-A (OTG) or adapter MHL.
📱 Phone with support USB-host mode (most models Samsung, Xiaomi, Google Pixel).
🖥️ Set-top box with a USB port and support for connecting external devices.

Instructions:

Connect the phone to the set-top box via OTG cable.
On the set-top box, select the signal source USB in the menu Source.
If the screen does not appear, install an application on your phone to control the display (for example, SecondScreen).

💡

USB connection is more often used to control the set-top box from the phone (like a remote control), rather than to broadcast the screen. For video it is better to choose HDMI or Wi-Fi.

Limitations:

The maximum resolution is usually 1080p.
Not all set-top boxes support this mode (for example, Amazon Fire TV Stick does not work with OTG for video).
May occur problems with sound.

4. Using the phone as a remote control

If the main goal is to control the set-top box and not broadcast the screen, the easiest way is to use the phone as remote. Remote control. Most Android TV set-top boxes support official applications from the manufacturer or universal solutions.

Popular applications:

📱 Google TV (for set-top boxes on Android TV 10+).
📱 Mi Remote Controller (for Xiaomi Mi Box).
📱 Yatse: Remote for Android TV (universal, with support for voice control).
📱 Unified Remote (for advanced users, with macro settings).

How to set up:

Install the application on your phone.
Connect the phone and set-top box to the same Wi-Fi network.
In the application, select your set-top box from the list of devices.
If necessary, confirm pairing on the TV screen.

Additional features:

🎤 Voice search (via Google Assistant).
🎮 Game buttons (in Yatse or Unified Remote).
📝 Entering text from the phone keyboard.

💡

If the standard remote control is lost and the phone does not connect via Wi-Fi, use Bluetooth: many set-top boxes (for example, NVIDIA Shield) support pairing via BT for controls.

5. Connection for games (streaming and cloud services)

If you want to play on a big screen, but the console does not support modern games, you can stream them from your phone. streaming from PC via

🎮 Steam Link (for games from Steam).
🎮 Moonlight (for streaming from PC via NVIDIA GameStream).
🎮 Xbox Cloud Gaming or GeForce NOW (cloud gaming).
🎮 Parsec (for low latency).

How to set up streaming via Moonlight:

Install Moonlight to your phone and GeForce Experience to a PC with a video card NVIDIA.
Enable GameStream in the settings GeForce Experience.
Connect your phone and PC to the same network (preferably via cable or 5 GHz Wi-Fi).
Run Moonlight on your phone and select your PC.
Connect the gamepad to your phone by Bluetooth or use touch controls.

Requirements for a comfortable gaming:

📶 Wi-Fi speed not less than 50 Mbit/s (for 1080p60).
🖥️ A powerful PC (for local streaming).
🎮 Gamepad with support XInput (for example, Xbox Controller or 8BitDo).

How to reduce delays when streaming games?

1. Use a wired connection (Ethernet) for the PC and console.

2. In settings Moonlight select 60 FPS bitrate 20-50 Mbps.

3. PC.

4. If you play via Wi-Fi, select a channel 5 GHz with minimal interference (use applications like WiFi Analyzer).

6. Alternative methods (Bluetooth, DLNA, Plex)

If the main task is transferring files or listening to music, you can do without screen duplication:

1. Transferring files via Bluetooth:

Pair the phone and the set-top box in the menu Settings → Bluetooth.
Send files (photos, music) through the menu Send on your phone.
Limitation: low transfer speed, not suitable for video.

2. DLNA server (for media files):

Install the server application on your phone (for example, BubbleUPnP or Plex).
On the set-top box, open a media player that supports DLNA (for example, Kodi or VLC).
Select your phone as a content source.

3. Plex or Kodi to organize a media library:

Install Plex Media Server on PC or NAS.
Add media files to the library.
On the set-top box, install Plex or Kodi and connect to the server.

💡

DLNA and Plex are ideal for watching movies or listening to music, but are not suitable for games or screen mirroring.

Comparison of connection methods

Method	Latency	Max. resolution	Wi-Fi required	Difficulty	Best for
HDMI (USB-C)	Minimal	4K@60Hz	No	Low	Games, videos, presentations
Miracast	Average	1080p@60Hz	Yes	Average	Screen duplication
Google Cast	Low	4K@30Hz	Yes	Low	Video/music streaming
USB (OTG/MHL)	Medium	1080p	No	High	Management, file transfer
Steam Link / Moonlight	Depends on the network	4K@60Hz	Yes	Medium	Games on PC

Important: to stream games in 4K at 60 Hz over Wi-Fi, you need a router that supports Wi-Fi 6 (802.11ax) and a 160 MHz channel. Otherwise, lags will be inevitable.

FAQ: Frequently asked questions and answers

📱 Why doesn’t the set-top box see my phone when broadcasting via Miracast?

The problem may be:

Different versions of Wi-Fi (for example, a phone on 5 GHz, and the set-top box on 2.4 GHz).
Disabled mode Wireless Display on the set-top box.
Outdated firmware (update the software of the set-top box and phone).

Solution: reboot both devices and check the network settings.

🎮 Is it possible to play Genshin Impact or Call of Duty Mobile from your phone to TV via console?

Yes, but with reservations:

For minimal delays, use HDMI connection.
When broadcasting over Wi-Fi (Miracast), lags will be noticeable in dynamic games.
To control, connect the gamepad to the phone via Bluetooth.

The best option is streaming via Steam Link (if the game is installed on a PC) or Moonlight.

🔊 Why is there no sound when connected via HDMI?

Check:

In the phone settings, audio output is selected to HDMI (Settings → Sound → Output).
The cable and adapter support audio transmission (some cheap adapters only transmit video).
On the correct signal source is selected for the set-top box (HDMI ARC if used).

If the sound comes only through the phone, try a different cable or adapter.

📺 Is it possible to connect an iPhone to an Android TV set-top box?

Yes, but the choice of methods is limited:

Via HDMI (adapter required Lightning → HDMI).
Via Google Cast (only for streaming content, for example, from YouTube).
Miracast on iPhone is not supported - use AirPlayinstead, but the set-top box needs it support (for example, NVIDIA Shield with updating).

🔄 How to make sure that the phone screen does not go dark during the broadcast?

Set up:

On the phone: Settings → Screen → Sleep → Never (or increase timeout).
In the broadcast application (for example, Miracast), disable the option Turn off screen when connected.
Use the Do not disturbmode so that notifications do not interrupt the broadcast.

💡

If you often connect your phone to a set-top box, create a separate Wi-Fi network for these devices. This will reduce interference and improve broadcast stability.

If none of the methods worked, check:

🔧 Compatibility of your phone model and set-top box (for example, Samsung DeX does not work with all Android TVs).
🔄 Firmware updates on both devices.
🛠️ Router settings (disable AP Isolationif enabled).

⚠️ Attention: some manufacturers (for example, Amazon for Fire TV Stick) limit the functionality of Miracast. In such cases, use Google Cast or third-party applications like ApowerMirror.

How to connect a smartphone to an Android TV set-top box: all methods with instructions