How to Cast Your Phone to Any TV (Chromecast, Miracast, and Cables)

You’ve got a video on your phone and a big TV three metres away. Should be simple. Instead you’re staring at a menu called “Smart View” that can’t find anything, or a cable that charges your phone but refuses to show a picture. Casting is one of those things that works beautifully right up until it doesn’t, and then nobody can tell you why.

Here’s the thing: there isn’t one way to get your phone onto a TV. There are three, they work completely differently, and picking the wrong one is why your screen stays black.

The quick answer: There are three routes. Casting (Chromecast / Google Cast) sends a link to the TV, which streams the video itself over your Wi-Fi. Your phone becomes a remote, the picture stays sharp, and you can use your phone for other things. Screen mirroring (Miracast, Samsung Smart View) copies whatever is on your display to the TV over a direct wireless link. It shows everything, including apps that block casting, but it drains battery and can lag. Cables use USB-C to HDMI and need a phone that supports video output over USB-C, which many budget phones don’t. Start with casting if the app has the cast button. Fall back to mirroring for anything else. Use a cable when Wi-Fi is unreliable or you need zero lag.

Casting vs mirroring: the difference that explains everything

This is the single most useful thing to understand, so it’s worth 60 seconds.

When you cast a YouTube video, your phone doesn’t send the video anywhere. It sends the TV a message that basically says “play this video, starting at 4 minutes 12 seconds.” The TV then fetches the stream from the internet on its own. Your phone drops out of the loop. That’s why you can lock your phone, take a call, or walk out of the room and the video keeps playing. It’s also why the picture quality is as good as your TV’s connection allows rather than being limited by a wireless relay.

When you mirror, your phone is doing real work. It’s encoding your screen into video, in real time, and beaming it to the TV continuously. Everything shows up, including your notifications and your home screen. But the phone gets warm, the battery drops fast, and there’s a delay of anywhere from a fraction of a second to a couple of seconds. That delay is fine for photos and terrible for games.

So: casting is a request. Mirroring is a live feed. Almost every casting problem people run into is because they wanted one and got the other.

Route 1: Chromecast and Google Cast (the one you should try first)

Google Cast is built into a lot more devices than people realise. Chromecast dongles obviously, but also most Android TV and Google TV sets, plenty of smart TVs from other brands with “Chromecast built-in” on the box, and many smart speakers and displays for audio.

The requirement is simple and it trips up almost everyone: your phone and the TV must be on the same Wi-Fi network. Not “both connected to the internet.” The same network. If your router broadcasts a 2.4GHz and a 5GHz name separately, and your phone is on one while the TV is on the other, casting often fails to discover anything. Guest networks are the other classic killer, because they usually isolate devices from each other by design.

Once you’re on the same network, look for the cast icon in the app itself. It’s the little rectangle with the Wi-Fi arcs in the corner, usually top-right. YouTube, Netflix, Disney+, Spotify, Google Photos and most big streaming apps have it. Tap it, pick your TV, done.

A few things worth knowing:

• Your phone can leave. Once a cast is running, you can close the app. The TV keeps playing. Reopening the app gives you the controls back.
• Volume buttons control the TV. While casting, your phone’s volume rocker adjusts the TV’s volume, which feels like magic the first time.
• Not every app allows it. Some services deliberately block casting for licensing reasons, and some only allow it on certain subscription tiers.
• There’s also whole-screen casting. The Google Home app has a “Cast screen” option that’s technically mirroring dressed up in Cast clothing. It works, but it’s slower than app-based casting.

When the TV doesn’t appear

Work through this in order. Confirm both devices are on the same Wi-Fi band and network. Restart the TV properly by unplugging it at the wall for 30 seconds rather than using the remote’s power button, because standby doesn’t reset the network stack. Turn your phone’s Wi-Fi off and on. Check that your router doesn’t have “AP isolation” or “client isolation” enabled, a setting that stops devices seeing each other and breaks all casting. If you’ve got a mesh system, make sure both devices are on the same SSID rather than separate node names.

Route 2: Miracast and screen mirroring

Miracast is the standard behind most “screen mirroring” features. It creates a direct wireless link between phone and TV, which means it doesn’t strictly need a router at all, though in practice most phones still want Wi-Fi switched on.

Where you find it depends entirely on your brand:

• Samsung (One UI): pull down the Quick Settings panel and look for Smart View. It’s one of the tiles, though you may need to swipe to the second page or tap the edit pencil to add it.
• Xiaomi (HyperOS): Quick Settings has a Cast tile, and there’s a matching entry under Settings > Connection & sharing.
• Pixel: Google removed the built-in Miracast option years ago. Pixels do Google Cast, not Miracast. To mirror a Pixel you use the Google Home app’s cast-screen feature, which needs a Cast-compatible TV.
• Most others: look under Settings > Connected devices or Settings > Display for something called Cast, Wireless display, or Screen mirroring.

On the TV side you usually need to put it into a receiving mode first. Samsung TVs often just accept an incoming connection. LG has Screen Share. Sony Bravia sets have a mirroring input you select from the source list. If the TV isn’t listening, your phone will scan forever and find nothing.

The DRM wall

Here’s the frustration nobody warns you about: mirror your screen and open a paid streaming app, and you may get a black rectangle with the audio still playing. That’s not a bug. Protected video content is deliberately blocked from mirrored output. The fix isn’t a setting, it’s using that app’s own cast button instead, which is a licensed path the app approves of.

Route 3: Cables, for when wireless just won’t

Cables are unfashionable and genuinely the most reliable option. No lag, no dropouts, no network archaeology.

The catch is that your phone has to support DisplayPort Alt Mode over its USB-C port. This is the part people get wrong. A USB-C port is a shape, not a promise. Plenty of budget and mid-range phones have USB-C that handles charging and data but carries no video signal at all. No adapter can fix that, because there’s nothing to adapt.

Broadly: flagship Samsung Galaxy phones support it and pair it with DeX, a proper desktop-style interface. Recent Pixels support display output. Many mid-range and budget phones don’t. If you’re unsure, search your exact model plus “DisplayPort Alt Mode” before buying anything.

If your phone does support it, you need a USB-C to HDMI adapter or cable. Buy one from a brand you’ve heard of. The cheapest ones tend to be USB-C to HDMI converters that only work with specific chipsets, or worse, they’re really MHL adapters, an older standard modern phones dropped. A powered adapter with a pass-through charging port is worth the extra, because driving a TV chews battery.

Which one should you actually use?

Watching Netflix, YouTube or Prime Video? Cast. Better quality, free phone, less heat.

Showing holiday photos, a slideshow, or a website that has no cast button? Mirror.

Presenting from your phone, or gaming, or your Wi-Fi is congested and mirroring stutters? Cable.

Older TV with no smart features at all? A cheap Chromecast dongle in the HDMI port turns it into a casting target for less than the price of a decent cable.

Myths worth killing

“You need internet to cast.” You need a network. Casting local files from your phone’s storage works on a router with no internet connection at all, because the traffic never leaves your house. What you can’t do is cast a Netflix stream without internet, obviously, because the TV has to fetch it.

“Casting uses your phone’s data.” When you cast a streaming app, the TV downloads the video over your home broadband. Your phone’s mobile data isn’t involved beyond the tiny handshake. Mirroring is the opposite: everything goes through your phone.

“A USB-C to HDMI cable works with any phone.” Covered above, and it’s the single most common wasted purchase in this whole category.

“Screen mirroring is higher quality because it’s the real screen.” It’s usually lower quality. Mirroring compresses your display on the fly and sends it over a wireless link. Casting lets the TV pull the original stream at full quality.

A few habits that make this painless

Give your TV a sensible name in its settings. “Living Room TV” beats picking between three identical model numbers. If casting keeps dropping, check whether your router is overloaded, and consider moving the TV to the 5GHz band if it’s close enough to the router. And if mirroring is making your phone uncomfortably hot, that’s normal for the encoding workload, but it’s a sign you should be casting instead. While you’re tidying up your phone’s behaviour, some of the less obvious Android settings also affect how smoothly wireless features perform day to day.

FAQ

Why does my TV show up but the connection fails immediately?

Usually a network mismatch that discovery papered over, or the TV is already connected to another device. Some TVs only accept one mirroring session at a time and won’t tell you the slot is taken. Restart the TV at the wall, make sure no other phone in the house is connected, and try again. If it still fails, temporarily disable any VPN on your phone, since VPNs frequently break local device discovery.

Can I cast to a TV that isn’t smart?

Yes, with a dongle. A Chromecast or any Google TV streaming stick plugged into a spare HDMI port turns a dumb TV into a cast target. Some cheap generic “anycast” dongles claim to do everything and support half of it badly, so stick to known brands.

Why is there a delay between my phone and the TV?

Because mirroring encodes, transmits and decodes your screen continuously, and each step costs time. A delay of half a second to two seconds is normal. There’s no setting that removes it. If the lag matters, such as for gaming or anything with precise timing, use a cable instead.

Does casting drain my phone’s battery?

Barely. Once the cast is running your phone is basically idle, acting as a remote. Mirroring is a completely different story, since your phone is encoding video non-stop and typically runs hot. If your battery is struggling generally, it’s worth checking what else is running, and freeing up storage headroom often helps performance more than people expect.