How to Cast to TV From Android: Wireless, Miracast, and Fixes

The Cast button on your Android phone does nothing until the TV and the phone agree on how to talk to each other. The fix starts with telling Google Cast apart from Miracast, because the two use different networks and different ideas of what should be on screen.

Android casting options: Google Cast, Miracast, Smart View, and HDMI adapters ·
Google Cast setup: Phone and TV on the same Wi-Fi network ·
Miracast setup: Wi-Fi Direct; no router needed ·
Wired fallback: USB-C to HDMI cable or MHL adapter

Quick snapshot

1Confirmed facts

Google Cast requires the phone and receiver to be on the same Wi-Fi network (Google Chromecast Help (official support)).
Android screen casting is available on devices running Android 8.0 or later (Google Cast Help (Google’s casting guide)).
Samsung describes its phone-to-TV mirroring connection as using Wi-Fi Direct (Samsung New Zealand Support (official screen mirroring guide)).

2What’s unclear

The exact menu name for Miracast isn’t standardized; Samsung labels it Smart View and tells users to turn on screen mirroring from the TV (Samsung Lebanon Support (official Smart TV support)).
Router isolation and band settings can keep a TV hidden; Google lists AP/client isolation as a common casting blocker (Google Chromecast Help (official troubleshooting guide)).
A restart can fix temporary Smart View failures, but Samsung doesn’t present it as a guaranteed cure (Samsung Lebanon Support (official Smart TV support)).

3Timeline signal

Android’s screen casting feature is tied to Android 8.0 or later (Google Cast Help (Google’s casting guide)).
Google recommends keeping the phone within about 15 feet (4 meters) of the streaming device (Google Chromecast Help (official support)).
Samsung’s wireless mirroring path works over Wi-Fi Direct, so the phone and TV connect without waiting on a router (Samsung New Zealand Support (official screen mirroring guide)).

4What’s next

Put the phone and TV on the same Wi-Fi network before trying Chromecast (Google Chromecast Help (official support)).
If the TV is a Miracast display, switch it to screen mirroring mode first (Samsung Lebanon Support (official Smart TV support)).
Keep a USB-C to HDMI adapter ready for TVs that don’t show up on any wireless list (Samsung New Zealand Support (official screen mirroring guide)).

Seven labels, one pattern: every wireless path is either a network-dependent stream or a direct phone-to-TV mirror, and the wired adapter is the universal escape hatch.

Label	What it means	Backed by
Google Cast	Streaming receiver protocol used by Chromecast, Android TV, Google TV, and many smart TVs.	Google Chromecast Help (official support)
Miracast	Peer-to-peer screen mirroring standard over Wi-Fi Direct.	Samsung New Zealand Support (official screen mirroring guide)
Google Cast network	Phone and receiver on same Wi-Fi network.	Google Chromecast Help (official support)
Miracast network	Direct phone-to-TV link; router not required.	Samsung New Zealand Support (official screen mirroring guide)
Wired fallback	USB-C to HDMI adapter or MHL cable for TVs without wireless casting.	Samsung New Zealand Support (official screen mirroring guide)
Android version	Google’s screen casting feature requires Android 8.0 or later.	Google Cast Help (Google’s casting guide)
Router warning	AP/client isolation can block casting even on the same network.	Google Chromecast Help (official support)

What is Google Cast?

Google Cast is the protocol behind the Cast button in Android video apps. It treats the TV as a receiver: the phone tells the TV what to play, and the TV fetches that stream from the internet (Google Cast Help (Google’s casting guide)).

How does Google Cast work?

The phone sends a stream URL to a compatible receiver, so the receiver loads the content instead of mirroring the phone screen (Google Cast Help (Google’s casting guide)).
The phone and receiver must be connected to the same Wi-Fi network name (SSID) for casting to work (Google Chromecast Help (official support)).
Google’s screen casting feature is available on Android 8.0 or later (Google Cast Help (Google’s casting guide)).

The implication: that design explains why a Cast connection can keep running after you leave the phone screen — the TV is the player, not the mirror. When Google Home mirrors the screen instead, the phone has to keep sending frames — a different job entirely (Google Cast Help (Google’s casting guide)).

Which TVs have Google Cast built in?

Any TV with Chromecast built-in, Android TV, or Google TV can act as a Cast receiver (Google Chromecast Help (official support)).
A separate Chromecast or Google streaming device plugged into an HDMI port brings Cast to a TV that has no built-in support (Google Chromecast Help (official support)).

What this means: If the TV doesn’t appear in the Cast list, it may not be a Cast receiver at all — check the TV’s input menu for a mirroring mode before blaming the phone.

What is Miracast?

Miracast is the standard that many TVs label as Screen Mirroring, Smart View, or Wireless Display. Samsung’s support pages describe it as a Wi-Fi Direct connection between the phone and the TV, not a stream fetched from the internet (Samsung New Zealand Support (official screen mirroring guide)).

How is Miracast different from Google Cast?

The trade-off

Casting is two different jobs, not one: Google Cast needs a home network, Miracast creates its own. Pick the TV’s native path first, and let HDMI be the tiebreaker.

Path	Network	What the TV gets	Backed by
Google Cast	Phone and receiver on same Wi-Fi network	A stream URL; the receiver fetches content	Google Chromecast Help (official support)
Miracast	Wi-Fi Direct phone-to-TV link	A live mirror of the phone screen	Samsung New Zealand Support (official screen mirroring guide)
Smart View	Phone and TV on same Wi-Fi network; screen mirroring enabled on TV	Samsung TV mirrors the phone screen	Samsung Lebanon Support (official Smart TV support)
HDMI adapter	Wired; no network involved	A direct video signal from the phone	Samsung New Zealand Support (official screen mirroring guide)

What is Smart View?

Smart View is Samsung’s name for phone-to-TV mirroring, and Samsung says the phone and TV should be on the same Wi-Fi network while screen mirroring is enabled on the TV (Samsung Lebanon Support (official Smart TV support)).
Samsung’s New Zealand guide also describes the underlying phone-to-TV connection as Wi-Fi Direct (Samsung New Zealand Support (official screen mirroring guide)).
If wireless mirroring fails, Samsung’s documented alternative is HDMI, not more wireless attempts (Samsung New Zealand Support (official screen mirroring guide)).

Bottom line: The catch: Google Cast is tied to your home network; Miracast carries its own network in the phone. The HDMI adapter is the neutral option when neither wireless protocol is available.

How do I pair my phone screen to my TV?

Pairing starts with identifying the TV’s receiver type. If it’s a Cast receiver, use the Cast button. If it’s a Miracast display, put the TV into mirroring mode first — Samsung’s support page makes that TV-side step the prerequisite (Samsung Lebanon Support (official Smart TV support)).

How to screen mirror Android to TV wirelessly?

Open the TV’s input or source menu and look for Screen Mirroring, Smart View, or Wireless Display — that’s the Miracast mode (Samsung New Zealand Support (official screen mirroring guide)).
On the Android phone, open Quick Settings and tap Cast or Screen cast (Google Cast Help (Google’s casting guide)).
If the TV is a Cast receiver, select it from the list; the phone and TV must be on the same Wi-Fi network (Google Chromecast Help (official support)).
If the TV is in mirroring mode, accept or confirm the connection on the TV screen (Samsung Lebanon Support (official Smart TV support)).

How do I cast to TV from Android phone without Wi-Fi?

Use Miracast over Wi-Fi Direct: the phone-to-TV link does not need a router or internet connection (Samsung New Zealand Support (official screen mirroring guide)).
If the TV has no wireless mirroring option, use a USB-C to HDMI adapter connected directly to the phone and TV (Samsung New Zealand Support (official screen mirroring guide)).
A USB charging cable alone won’t produce video; the phone must support a wired display mode and use a compatible video adapter (Samsung New Zealand Support (official screen mirroring guide)).

How do I screen mirror Android to TV without Chromecast?

No Chromecast needed if the TV supports Miracast or Smart View, because the TV and phone connect over Wi-Fi Direct (Samsung New Zealand Support (official screen mirroring guide)).
No wireless option? HDMI does not require Chromecast, Wi-Fi, or an internet connection (Samsung New Zealand Support (official screen mirroring guide)).
For apps on a Google TV or Android TV, Sony says the phone and TV must still be on the same Wi-Fi network before casting works (Sony Support (TV maker’s help center)).

The pattern: “without Wi-Fi” means different things. Miracast covers “no router,” HDMI covers “no wireless at all,” and Google Cast needs a shared home network before it even appears on your list.

Why is my screen mirroring not working?

Most failures come from one of two places: the network or the TV’s input mode. Work through the list below in order, and you’ll usually find the point where the chain breaks.

Why won’t my phone connect to my TV?

For Google Cast, the first check is the same-network rule: the phone and TV must be on the same Wi-Fi network name (Google Chromecast Help (official support)).
For Miracast, the TV has to be in screen mirroring mode before the phone can see it (Samsung Lebanon Support (official Smart TV support)).
If both look right, restart the phone and the TV; Samsung says that can clear temporary Smart View connection failures (Samsung Lebanon Support (official Smart TV support)).

Why isn’t my TV showing up when I try to cast?

Check the network name first: the phone and the Cast receiver must share the same Wi-Fi SSID (Google Chromecast Help (official support)).
Router AP/client isolation can block communication between devices even when both are on the same network (Google Chromecast Help (official support)).
Google also recommends using the same Wi-Fi band — either 2.4 GHz or 5 GHz — and keeping the phone within about 15 feet (4 meters) of the streaming device (Google Chromecast Help (official support)).

Why isn’t my Wi-Fi connected when I try to screen cast?

Samsung notes that wireless screen mirroring requires Wi-Fi connectivity on the TV itself (Samsung New Zealand Support (official screen mirroring guide)).
On a Samsung TV, connect the phone and TV to the same network, then turn on screen mirroring from the TV’s input menu (Samsung Lebanon Support (official Smart TV support)).
If the TV still drops out, update the TV, the phone, and the casting app; Sony’s guidance includes all three when casting fails (Sony Support (TV maker’s help center)).

Why this matters

AP/client isolation can make a healthy phone and TV invisible to each other, so no casting app will fix it. This is the one fix that lives in the router, not in the TV menu.

The pattern: most “not working” cases are either the wrong protocol or a network isolation setting, not a hardware failure.

How do I reset screen mirroring?

A reset is the right move after you’ve confirmed the basic network setup. Start with the least destructive option and work up.

How do I reset screen mirroring on Android?

Restart the phone and the TV first; Samsung says restarts can resolve temporary Smart View connection failures (Samsung Lebanon Support (official Smart TV support)).
Update the phone, the TV, and the casting app; Sony lists firmware and app updates as part of normal cast troubleshooting (Sony Support (TV maker’s help center)).
If the Cast option has disappeared, confirm the phone is running Android 8.0 or later, because that’s the version Google ties its screen casting feature to (Google Cast Help (Google’s casting guide)).

How do I clear the casting app cache?

If Google Home is the casting app, check that Google Play Services has the microphone permission the screen casting feature requires (Google Cast Help (Google’s casting guide)).
For a TV maker’s mirroring app, the cache reset lives in Android’s app settings, but the TV-side mirroring mode still has to be on before the phone will find the TV (Samsung Lebanon Support (official Smart TV support)).
After clearing cache, try the cast again before resetting the network; cache is a phone-side convenience, not a substitute for the TV being in the right mode.

What should I check after a network reset?

Reconnect the phone and TV to the same Wi-Fi network name; Google makes this the first check when a Cast device doesn’t appear (Google Chromecast Help (official support)).
Keep both devices on the same Wi-Fi band; Google suggests matching the 2.4 GHz or 5 GHz channel between the phone and receiver (Google Chromecast Help (official support)).
If the router has AP/client isolation enabled, turn it off and test the cast again (Google Chromecast Help (official support)).

The upshot

Restarting is the cheapest reset. Only update or clear app data after you’ve confirmed the TV is in the correct input mode and the network allows discovery.

The catch: a reset is only useful after you’ve confirmed the TV is in the right mode and the network lets the phone see it. A reset won’t fix a Wi-Fi isolation rule or a protocol mismatch.

Confirmed facts

Google Cast requires the phone and receiver to be on the same Wi-Fi network (Google Chromecast Help (official support)).
Samsung’s screen mirroring uses Wi-Fi Direct, so the phone and TV can connect without a router or internet (Samsung New Zealand Support (official screen mirroring guide)).
Google’s screen casting feature is available on Android 8.0 and later (Google Cast Help (Google’s casting guide)).

What’s unclear

The exact menu name for Miracast changes by TV maker and firmware, so the button you’re looking for is not universal.
Router band, multicast isolation, or app cache can hide a TV from the casting list, and the specific trigger is device-dependent.
Some Android manufacturers restrict Miracast for licensed content, and the reasons are not always documented by the OEM.
Samsung says restarting both devices may fix temporary Smart View failures, but it’s not a guaranteed reset (Samsung Lebanon Support (official Smart TV support)).

What the official guides say

“Google Cast screen mirroring generally requires the Android device and the Google streaming device or Cast-enabled TV to be connected to the same Wi-Fi network name.”

Google Chromecast Help (Google’s official troubleshooting guide)

“Wireless screen mirroring uses Wi-Fi Direct technology to connect the phone and the TV directly, with no router in the middle.”

Samsung New Zealand Support (TV maker’s screen mirroring guidance)

“When wireless mirroring doesn’t connect, the documented fallback is an HDMI adapter, an HDMI cable, and the TV’s HDMI input.”

Samsung New Zealand Support (official HDMI setup instructions)

The bottom line: Every casting session comes down to one question: is the TV expecting a Cast stream or a mirrored screen? Android users who answer that before opening the Cast menu skip the most common failure loop — checking the phone, restarting the router, and still staring at an empty device list. For anyone with an Android phone and a TV that supports either protocol, the decision is clear: match the method to the TV’s receiver type, or keep a USB-C to HDMI adapter nearby as the no-network fallback.

Additional sources

assets-global.website-files.com, whathifi.com, troopmessenger.com

Frequently asked questions

Is screen mirroring the same as casting?

No. Google Cast sends a stream URL to a compatible receiver, while Miracast mirrors the phone’s screen over a direct wireless link (Google Cast Help (Google’s casting guide)).

Can I cast to a non-smart TV with an HDMI cable?

Yes, with the right hardware. Samsung’s documented setup uses a compatible phone adapter, an HDMI cable, and the TV’s HDMI input (Samsung New Zealand Support (official screen mirroring guide)).

Why does my Android phone stop casting when the screen locks?

With screen mirroring, the phone keeps sending the screen to the TV, so locking the display interrupts the feed. Google Cast is different because the receiver fetches the stream itself (Google Cast Help (Google’s casting guide)).

Will casting from Android work on any smart TV?

No. The TV needs to support Google Cast or a Miracast-style mirroring mode. If it has neither, an HDMI adapter is the fallback (Samsung New Zealand Support (official screen mirroring guide)).

How do I stop screen mirroring on Android?

Disconnect from the active Cast or Screen Cast tile in Quick Settings; the Android casting feature is available on Android 8.0 and later (Google Cast Help (Google’s casting guide)).

Which apps support Google Cast on Android?

Apps with Cast support appear as compatible senders in Google’s Cast ecosystem; the phone controls the stream, and the receiver plays it (Google Cast Help (Google’s casting guide)).