In this guide
Yes, a phone can output video through USB-C to HDMI — but only if the phone’s USB-C port supports DisplayPort Alt Mode or a similar video output standard. Not all USB-C ports do this, and a plain charging-only USB-C port will never carry video no matter what cable or adapter you use.
- Your phone supports DisplayPort Alt Mode over USB-C
- You use a certified USB-C to HDMI cable or Active adapter
- Your phone’s USB-C port is charge/data only with no Alt Mode
- You plug into a passive adapter and your phone needs an active one
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Why some phones can do it and others can’t
USB-C is just a connector shape. What actually sends video down the cable is a feature called DisplayPort Alt Mode, which lets the port carry a display signal alongside its normal USB duties. Phone makers choose whether to include this — and many budget or mid-range phones skip it to cut costs.
Samsung’s flagship Galaxy S and Note lines, Google Pixel 6 and newer, and OnePlus flagships typically support it. Many Snapdragon 8-series chipsets enable it by default, but the manufacturer still has to wire it up and unlock it in software. Always check your specific model’s spec sheet rather than assuming.
How to check your phone
The fastest method is to search “[your phone model] DisplayPort Alt Mode” or look at the USB specification listed on the manufacturer’s product page. If it says USB 3.1 or USB4 with video output, you’re likely good. If it only says USB 2.0, video output is almost certainly not supported. You can also read our broader explainer on Does USB-C Support Video? for a full breakdown of what the specs mean.
What cable or adapter do you need?
If your phone supports Alt Mode, you have two options:
- USB-C to HDMI cable — a single cable that plugs directly into your phone and into an HDMI port on a TV or monitor. Clean and simple.
- USB-C to HDMI adapter — a small dongle that converts the signal. Useful if you already have an HDMI cable handy.
Either way, make sure the cable or adapter is rated for video (look for “4K” or “DisplayPort Alt Mode” in the product description). A cheap, unbranded adapter may not include the necessary wiring. For a deeper look at compatibility between the connector types, see Can USB-C Connect to HDMI?
What about Miracast or wireless options?
If your phone doesn’t support wired video output, a wired USB-C to HDMI connection simply won’t work — no workaround exists for missing hardware. Your best alternative is wireless casting via Miracast, Chromecast, or AirPlay depending on your TV. These are separate technologies and don’t require Alt Mode at all.
Common reasons it stops working
Even with a compatible phone, things can go wrong. A worn cable, a passive adapter where an active one is needed, or the TV being set to the wrong input are the most frequent culprits. The Why Is USB-C to HDMI Not Working? guide walks through each fix step by step.
The USB Implementers Forum maintains an official library of USB specification documents if you want to verify Alt Mode requirements at the source.
Bottom line
A phone can absolutely output video through USB-C to HDMI — the catch is that the phone must support DisplayPort Alt Mode. Check your model’s spec sheet first, grab a certified USB-C to HDMI cable, and the connection is usually plug-and-play. If your phone lacks Alt Mode, a wired connection won’t work and you’ll need to go wireless instead.