How to Connect Samsung Galaxy J3 to TV

This guide walks you through every way to connect a Samsung Galaxy J3 to a TV, from wired HDMI to wireless screen mirroring. You’ll learn what cables or adapters work with the J3’s micro-USB port, how to use Smart View for a wireless connection, and what to do when the TV doesn’t show your phone’s screen. Before starting, make sure your TV is turned on and you know its input/source button—you’ll need it to switch to the correct HDMI port or screen mirroring mode.

What You’ll Need

Samsung Galaxy J3 (any variant: 2016, 2017, or 2018)
A TV with an HDMI port (most modern TVs have at least one)
For wired: a micro-USB to HDMI adapter (MHL or SlimPort compatible) and an HDMI cable
For wireless: a Wi-Fi network and a TV that supports screen mirroring (Miracast, Smart View, or Chromecast built-in)
Optional: a Chromecast or Roku device if your TV lacks built-in mirroring

Step-by-Step

Method 1: Wired Connection Using MHL/SlimPort Adapter

Check your J3’s model number (Settings > About Phone > Status). The Galaxy J3 (2016) supports MHL 2.0, while the 2017 and 2018 models do not support MHL. If you have a 2017 or 2018 J3, skip to Method 2 or 3.
Purchase a micro-USB to HDMI adapter that is MHL-certified. The J3’s port is micro-USB, not USB-C, so ensure the adapter matches.
Connect the micro-USB end of the adapter to your phone.
Plug one end of an HDMI cable into the adapter and the other end into an available HDMI port on your TV.
Some MHL adapters require external power—connect the adapter’s power cable to a USB wall charger if needed.
Turn on your TV and press the Input/Source button on your TV remote. Select the HDMI port you connected the cable to.
Your phone’s screen should appear on the TV. If not, unplug and replug the adapter, and ensure your phone is unlocked.

Method 2: Wireless Screen Mirroring with Smart View

Ensure your TV and J3 are connected to the same Wi-Fi network. If your TV supports Wi-Fi Direct, you can also use that without a router.
On your J3, swipe down from the top of the screen to open the notification panel.
Swipe down again to see the quick settings toggles. Look for an icon labeled “Smart View” (it looks like a rectangle with a Wi-Fi-like signal in the corner). If you don’t see it, tap the pencil/edit icon to add it.
Tap Smart View. Your phone will scan for available devices.
From the list, select your TV. If your TV supports Miracast but doesn’t show up, make sure screen mirroring is enabled on the TV (often found in the TV’s Network or Screen Mirroring settings).
Accept the connection prompt on your TV (if one appears). Your phone’s screen should now be mirrored.
To stop, tap Smart View again and select Disconnect.

Method 3: Using a Chromecast or Roku

Plug your Chromecast or Roku into an HDMI port on your TV and power it via USB.
Set up the device using its own app, and ensure both the streaming device and your J3 are on the same Wi-Fi network.
On your J3, open the app you want to cast (e.g., YouTube, Netflix). Look for the Cast icon (a rectangle with a Wi-Fi symbol).
Tap the Cast icon and choose your Chromecast/Roku from the list.
The app’s content will play on the TV. To mirror your entire phone screen (not just an app), use the Google Home app: open it, tap your device, then tap “Cast my screen.”

Common Mistakes

Buying the wrong adapter: The J3 uses micro-USB, not USB-C. Also, the 2017/2018 J3 models do not support MHL, so a wired adapter won’t work at all.
Forgetting to switch TV input: You might have the cable connected but the TV is still on the wrong input. Always press the Input/Source button and select the correct HDMI port.
Not enabling screen mirroring on the TV: Some TVs require you to turn on screen mirroring in the settings before they appear in the device list.
Being on different Wi-Fi networks: If your phone is on the 2.4GHz band and the TV is on the 5GHz band (or vice versa), they may not see each other. Connect both to the same band.
Expecting HDCP-protected content to mirror: Netflix, Hulu, and other apps may block screen mirroring due to copyright. Use the Cast icon within the app instead.

Tips

For the best wired experience, use a short, high-quality HDMI cable to reduce signal loss.
If your TV doesn’t support Miracast, consider a cheap HDMI wireless display adapter that plugs into the TV’s HDMI port—these work with Smart View.
Keep your phone charged during mirroring, as both wired and wireless connections drain the battery quickly.
If you’re using Smart View and the connection keeps dropping, move your phone closer to the TV or router, and close other apps that might be using Wi-Fi heavily.
On the J3, you can adjust the screen timeout to stay awake longer while mirroring (Settings > Display > Screen timeout).

Troubleshooting

No picture on the TV with wired connection: First, confirm your J3 model supports MHL (only the 2016 model does). If it does, try a different HDMI port on the TV, and make sure the adapter is powered if it has a power port. Also, try a different HDMI cable.
Smart View can’t find the TV: Make sure both devices are on the same network. Restart both the phone and the TV. On the TV, look for a “Screen Mirroring” or “Wi-Fi Direct” setting and enable it. If your TV is older, it may not support Miracast—use a Chromecast instead.
Connection drops frequently: Move the phone closer to the router, reduce interference from other devices, and disable power-saving mode on the phone (Settings > Battery > Power saving mode).
Video plays but no sound: Check the TV’s volume and make sure it’s not muted. On the phone, ensure media volume is up. For wired connections, some adapters have a separate audio output—if so, you may need to connect an audio cable.
Screen is laggy or pixelated: This is common with wireless mirroring. Close background apps, lower the screen resolution on the phone (Settings > Display > Screen resolution, if available), and ensure a strong Wi-Fi signal.
TV shows “No Signal”: Double-check the HDMI cable is firmly connected at both ends, and try a different HDMI port. Also, ensure the adapter is properly seated in the phone’s micro-USB port.

Frequently Asked Questions

Can I connect my Galaxy J3 to a TV without Wi-Fi?

Yes, you can use a wired MHL adapter if you have the 2016 J3 model. For wireless, you can use Wi-Fi Direct if your TV supports it, which doesn’t require a router—just a direct connection between the phone and TV.

Does the Galaxy J3 support MHL?

Only the Galaxy J3 (2016) model supports MHL 2.0. The 2017 and 2018 versions do not have MHL support, so they cannot use a wired micro-USB to HDMI adapter. For those models, use Smart View or a Chromecast.

Why won’t my J3 mirror to my Samsung TV?

Make sure both devices are on the same Wi-Fi network, and that your TV’s screen mirroring feature is enabled (look for “Screen Mirroring” in the TV’s Network settings). Also, ensure your phone’s Smart View is turned on and the TV is not already connected to another device.

Can I charge my phone while mirroring?

Yes, but it depends on the method. With MHL wired adapters, some have a separate power input that charges the phone. With wireless mirroring, you can plug the phone into a charger, but it may still drain faster than it charges if the screen is on at full brightness. Use a high-output charger.

Will screen mirroring show Netflix or other streaming apps?

Most streaming apps block screen mirroring due to HDCP copy protection. You’ll see a black screen or an error. Instead, use the Cast icon within the app to send content to a Chromecast or Roku, which is allowed.

Is there a way to extend my phone’s screen to the TV instead of mirroring?

No, the Galaxy J3 does not support extended display mode. It only mirrors your phone’s screen. For a true second-screen experience, you’d need a more advanced device or a computer.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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