The fastest way to stream to a Samsung TV depends on what you own and what you're streaming from

Most Samsung TVs made in the last five years can receive video from your phone, computer, or streaming device without extra hardware. The method you use depends on whether you're mirroring your entire screen, casting from an app, or connecting a device directly to an HDMI port. Samsung TVs support SmartThings (Samsung's casting system), AirPlay (Apple's system), and standard Miracast (Android's wireless mirroring). Some older models support only HDMI or older casting standards, so checking your TV's manual or settings menu first saves time.

Your choice matters because casting from an app (like Netflix or YouTube) is faster, uses less battery, and lets you keep using your phone while video plays on the TV. Screen mirroring shows everything on your phone or computer, which is useful for presentations or browsing, but drains battery quickly. HDMI connections are the most reliable but require a cable or a separate device plugged into the TV.

Key Takeaways

  • Samsung TVs built after 2016 usually support SmartThings casting, AirPlay, and Miracast without needing apps or setup beyond turning the feature on in the TV menu.
  • Casting from an app (like Netflix or YouTube) is faster and uses less battery than mirroring your whole phone screen.
  • If your TV is older or casting does not work, plugging in an HDMI cable from a streaming device or computer is the most reliable fallback.
  • Your phone and TV must be on the same Wi-Fi network for wireless casting to work; Bluetooth alone is not enough.

Casting from apps using SmartThings (Samsung and Android phones)

If you have a Samsung phone or any Android phone, and your TV was made after 2016, you can cast directly from Netflix, YouTube, Spotify, and most other apps without mirroring your whole screen. Open the app, tap the cast icon (usually three stacked lines with a Wi-Fi symbol), select your TV's name from the list, and the video plays on the TV while your phone screen goes dark or shows controls only.

To make sure your TV appears in the cast list, go to your TV's settings menu, find SmartThings or Wireless and Networks, and turn on Screen Mirroring or Remote Access. Both your phone and TV must be connected to the same Wi-Fi network. If your TV does not show up after 30 seconds, restart the app on your phone and try again. Casting from an app drains your phone battery much slower than mirroring your whole screen, and you can use your phone for other things while the video plays.

Mirroring your entire phone or computer screen

If you want to show everything on your phone or computer screen on the TV—not just one app—you use screen mirroring instead of casting. On Android phones, swipe down from the top of the screen twice to open Quick Settings, tap Wireless Display or Screen Mirroring, and select your TV. On iPhones and iPads, swipe down from the top right corner, tap Screen Mirroring, and select your TV's name.

On Windows computers, press the Windows key and P together, click Connect to a wireless display, and select your TV. On Mac computers, click the Control Center in the top right corner, select Screen Mirroring, and choose your TV. The first time you connect, your TV may ask you to confirm the pairing. After that, your device will remember the TV and reconnect faster. Screen mirroring works best on the same Wi-Fi network, though some older Samsung TVs support Miracast over a direct connection without Wi-Fi.

Using AirPlay for iPhones, iPads, and Mac computers

If you have an Apple device, your Samsung TV made after 2018 likely supports AirPlay 2, which is Apple's casting system. On an iPhone or iPad, swipe down from the top right corner, tap Screen Mirroring, and select your TV. To cast just one app instead of your whole screen, open the app (like Apple TV, Apple Music, or a podcast app), tap the AirPlay icon, and select your TV.

On a Mac, click the Control Center in the top right corner, select Screen Mirroring, and choose your TV. AirPlay is usually faster and more stable than Miracast because it is built into both Apple devices and newer Samsung TVs. If your TV does not show up in the AirPlay list, make sure both devices are on the same Wi-Fi network and that AirPlay is turned on in your TV's settings under Apple AirPlay Settings or AirPlay and HomeKit.

Connecting a streaming device or computer with HDMI

If wireless casting does not work or you want the most stable connection, plug a streaming device (like a Roku, Apple TV, Fire Stick, or Chromecast) or a computer directly into one of your TV's HDMI ports with an HDMI cable. Most Samsung TVs have two to four HDMI ports on the back or side. Once plugged in, the TV automatically detects the device, or you can press the Input or Source button on your remote to switch to that HDMI port.

HDMI is the most reliable method because it does not depend on Wi-Fi strength or compatibility. A streaming device like Roku or Fire Stick costs between $30 and $100 and gives you access to Netflix, YouTube, Disney+, and hundreds of other apps without needing to cast from your phone. If you use a computer, you may need an HDMI cable long enough to reach from your computer to the TV, or a wireless HDMI adapter (around $20 to $50) if running a cable is not practical.

Troubleshooting when casting does not work

If your TV does not show up in the cast list on your phone or computer, first check that both devices are on the same Wi-Fi network. Open your phone's Wi-Fi settings and your TV's network settings and confirm they show the same network name. If they do, restart both devices: turn off the TV for 10 seconds, turn it back on, then restart your phone or computer.

Next, check that casting is turned on in your TV's settings. Go to Settings > General > External Device Manager or Wireless and Networks and look for Screen Mirroring, SmartThings, AirPlay, or Miracast. If you see an option to turn it on, do so. If your TV is very old (before 2016), it may not support wireless casting at all, and HDMI is your only option. If you have tried all these steps and casting still does not work, check your TV's manual or Samsung's support website for your specific model number to see which casting methods it supports.

Frequently Asked Questions

Do I need a separate app to cast to my Samsung TV?

No. Most apps like Netflix and YouTube have a built-in cast button. For screen mirroring, you use your phone or computer's built-in settings, not a separate app. Samsung's SmartThings app is optional and mainly useful if you want to control your TV from your phone when you are not in the same room.

Can I cast without Wi-Fi?

Casting usually requires both devices on the same Wi-Fi network. Some older Samsung TVs support Miracast, which can work over a direct connection without Wi-Fi, but this is rare on newer models. HDMI is the only method that works without Wi-Fi at all.

Why does my phone battery drain so fast when I mirror my screen?

Screen mirroring uses more power than casting from an app because your phone is constantly sending video and audio data over Wi-Fi. Casting from Netflix or YouTube uses much less battery because the TV streams directly from the internet. If battery life matters, use app casting whenever possible.

What if my Samsung TV is too old to support casting?

TVs made before 2016 may not support SmartThings, AirPlay, or Miracast. Your best option is to plug a streaming device or computer into an HDMI port. A used Roku or Fire Stick from a reseller costs $20 to $40 and will add casting and app support to any TV with an HDMI port.

Can I cast from multiple devices at the same time?

No. Only one device can cast to your TV at a time. If someone else tries to cast while you are already casting, their device will either wait in a queue or interrupt your stream, depending on the casting method and your TV settings.