Casting to a TV, mirroring to a PC, or remote sharing: three different things
All four put your phone screen somewhere else, and people reach for the wrong one constantly. The deciding question is not quality — it is where the other screen physically is.
The four options
Casting (Chromecast / Google Cast). Not really screen sharing. The phone tells the TV what to play and the TV fetches it itself. That is why casting a video keeps working when you take a call, and why the picture is perfect — the TV is streaming directly and your phone is a remote control. It only works with apps that support it, and it cannot show your home screen.
Mirroring (Miracast, Smart View, screen cast). The actual screen, sent to a nearby display over a direct wireless link or the local network. Shows everything, including apps that do not support casting. Needs both devices on the same network or within direct wireless range, and quality varies a lot with interference.
A cable. USB-C to HDMI, if the phone supports video output. Perfect quality, no latency, no network. Not all phones support it, and it obviously requires being in the room.
Remote sharing. The screen is encoded and sent over the internet to someone who may be anywhere. Works between rooms, cities or countries. Lower quality than a cable and higher latency than mirroring, because that is the price of distance.
| Same room needed | Same network needed | Shows everything | Works over the internet | |
|---|---|---|---|---|
| Casting | Yes | Yes | No — supported apps only | No |
| Mirroring | Usually | Usually | Yes | No |
| Cable | Yes | No | Yes | No |
| Remote sharing | No | No | Yes | Yes |
Picking without thinking about it
- Watching a video on the TV: cast. Better quality, and your phone stays usable.
- Showing photos or an app to people in the room: mirror, or use a cable if the phone supports it.
- Presenting from a phone: cable if you can. Wireless mirroring in a room full of other wireless devices is where presentations go wrong.
- Showing something to someone who is not there: remote sharing. Nothing else in the list crosses a network boundary.
- Someone needs to fix something on your phone: remote sharing plus control. Mirroring and casting are one-way pictures; neither lets the other person act.
Why mirroring often disappoints
Wireless mirroring runs over the same 2.4 or 5 GHz spectrum as everything else in the building, and it is more sensitive to interference than ordinary browsing because it needs sustained bandwidth with low jitter. In a flat with many networks, in an office, or in any conference room, mirroring stutters while everything else feels fine.
If you have a choice and the two things are in the same room, a cable removes the entire category of problem. If you do not, moving closer to the router and turning off other uploads helps more than any setting in the mirroring menu.
The privacy difference nobody mentions
Mirroring and remote sharing expose exactly the same content — notifications, autofill, everything behind the app you meant to show. The difference is the audience. A mirrored screen is seen by a room you can look at; a remotely shared screen is seen by someone you cannot see, possibly recording. The preparation is the same either way, and it matters more in the second case: what the other person actually sees.
More guides
What the other person actually sees when you share your screen
Notifications, keyboard suggestions, autofill and everything behind the app you meant to show. What appears black and why, and how to share without leaking the rest of your phone.
Where your screen actually goes during a session
Signalling, direct connections and relays each see something different. What is encrypted, what leaks as metadata regardless, and the question that separates products.
Screen recording and screen sharing are not the same decision
One produces a file that outlives the moment; the other does not. What changes when a session is recorded, who is allowed to record whom, and the consent that matters.
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