Does My Phone Support USB-C to HDMI? How to Check DP Alt Mode

Your phone supports USB-C to HDMI only if its USB-C port supports DisplayPort Alternate Mode, usually shortened to DP Alt Mode. This is a hardware feature that the manufacturer chooses to include, and most mid-range and budget Android phones leave it out even though the port looks identical to the one on a flagship. Here is how to find out for your exact model in under a minute.

What DisplayPort Alt Mode actually is

USB-C is a connector shape, not a list of features. The plug has 24 pins, and the standard defines several ways to use them. The basic set covers charging and USB 2.0 data. Faster phones add high-speed lanes for USB 3.x. DP Alt Mode is an optional extra that lets the phone reassign those high-speed lanes to carry a DisplayPort video signal instead of USB data.

A USB-C to HDMI cable has a small chip inside that takes that DisplayPort signal and converts it to HDMI for the TV. The chip cannot generate video by itself. If the phone never puts a DisplayPort signal onto the pins, the chip receives nothing and the TV shows "No signal" while the phone happily charges.

Why two USB-C ports can be so different

Adding video output costs money. The phone's chipset needs a display controller that can drive an external screen, the port needs a multiplexer chip to switch the lanes between USB and DisplayPort, and the software has to support it. Manufacturers use this as a way to separate product tiers. A Galaxy S series gets it and DeX on top; a Galaxy A series with the same charger and the same cable does not.

The result is that two phones from the same brand, released the same year, with ports that look identical, can behave completely differently when you plug in a TV.

The USB 2.0 hint

There is a quick clue on any spec sheet: the USB version of the port.

DP Alt Mode uses the same high-speed lanes as USB 3.x. Phones with a USB 2.0 port, which includes most Galaxy A, Redmi, Realme, and Moto G models, physically do not have those lanes wired to the port, so video output is essentially never supported.

A USB 3.x port is necessary but not sufficient. The Pixel 6 and Pixel 7 both have USB 3.x ports, and Google left display output switched off until the Pixel 8. So read it this way: USB 2.0 means an almost certain no, and USB 3.x means maybe, keep checking.

How to check your phone

1. Read the spec sheet

Search for your exact model plus "specifications" on the manufacturer's site or a spec database. Under the USB entry, look for words like DisplayPort, DP 1.2, DP 1.4, video output, HDMI out, or DeX. If the entry only says "USB Type-C 2.0", assume no.

2. Look in the phone's settings

On Samsung phones, open Settings and search for DeX. If a Samsung DeX entry exists, the phone supports wired video output. On Motorola Edge phones, look for Ready For or Smart Connect. Most other brands have no dedicated setting, so an absence proves nothing.

3. Use the compatibility database

The phone compatibility database lists models by brand with a clear yes or no for wired output, with separate pages for Samsung, Google, OnePlus, Motorola, and other brands.

4. Use the app's built-in checker

The app reads your phone model and reports whether wired video output is expected to work, before you spend money on a cable. This is the fastest route if you already have the app installed.

Brands and models that generally support USB-C to HDMI

• Samsung: Galaxy S8 and later, Note 8 and later, all Z Fold models. These also support DeX.
• Google: Pixel 8 and later.
• OnePlus: OnePlus 12, OnePlus 13, and OnePlus Open.
• Motorola: Edge series models with Ready For or Smart Connect.
• Sony: Xperia 1 and Xperia 5 series.
• Huawei: Mate and P Pro series.
• Asus: ROG Phone and Zenfone.
• LG: G8, V50, V60, Velvet, and Wing.
• Fairphone: Fairphone 5.

Always confirm the exact model, because a "Lite", "FE", or regional variant can differ from the main model.

Brands and models that generally do not

• Samsung Galaxy A series, with very few exceptions.
• Google Pixel 7 and every earlier Pixel.
• Most Xiaomi, Redmi, and POCO phones.
• Most Realme and Oppo phones outside the Find flagships.
• Most Moto G phones.
• Nothing phones.
• Almost anything sold as a budget or entry-level phone.

If your phone is in this group and you already bought a cable, the not working guide explains why nothing you try will change the result, and what to do instead.

What about iPhone?

The iPhone 15 and every later iPhone support DP Alt Mode natively and work with any standard USB-C to HDMI cable, no app required. Lightning iPhones need Apple's Lightning Digital AV Adapter instead. The iPhone 15 USB-C to HDMI guide covers the details.

If your phone does not support it

There is no firmware trick, developer option, or special cable that adds video output to a phone that shipped without it. The good news is that you do not need a cable to get your photos and videos onto a TV.

Browser Cast, built into the app, sends media over your home Wi-Fi to the TV's own web browser. It works on any Android phone, including every model in the "no" list above, and on any smart TV with a browser. If the TV has Chromecast built in, Google Cast from the Photos app is another option. Neither gives you a wired connection, but for photos, home videos, and music they do the job.

Before you buy a cable

1. Find your exact model name in Settings, About phone.
2. Check it in the compatibility database or with the app checker.
3. If it is supported, pick a cable from the cable guide.
4. If it is not supported, skip the cable and use Browser Cast.

Two minutes of checking saves a return trip to the shop and a lot of frustration on the sofa.