Look inside your phone’s USB-C port. You’ll see 24 pins designed for high-speed data and massive power, but buried in the spec is a mode that allows those pins to act exactly like an HDMI cable. This is HDMI Alt Mode. Announced in 2016, it allowed a simple USB-C to HDMI cable to carry native HDMI 1.4 B signals, which are up to 4K at 30 Hz, directly to a TV without any conversion chips. It was a cheaper and simpler way to connect your phone to a big screen, but it was essentially dead on arrival because it was too limited to compete with DisplayPort.
The USB-C port is the undisputed king of connectivity, from the EU’s universal charging mandate to the rise of 80 GB per second USB4 v2. The one port rule, the mall dream, is functionally here. However, as the port became a jack of all trades, some of its most specialized features were left behind. The most notable casualty is HDMI Alt Mode, a clever native video feature that was supposed to revolutionize how we connect phones to TVs but was eventually varied by its superior competitor.
Why I stopped buying smart TVs, and what I bought instead
Remember when smart features worked for us, instead of against us?
15
The story behind HDMI Alt Mode
Why did it never take off?
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loading=\"lazy\" decoding=\"async\" alt=\"Several HDMI cables being held in a bundle\" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cable-bundle.jpg?q=49&fit=contain&w=750&h=422&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cable-bundle.jpg?q=49&fit=contain&w=750&h=422&dpr=2\" style=\"width: 100%; height: 100%; object-fit: contain;\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><li class=\"splide__slide gallery-main-img\"><picture><source media=\"(max-width: 480px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=contain&w=705&h=397&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=contain&w=705&h=397&dpr=2\" \/><img width=\"1500\" height=\"844\" loading=\"lazy\" decoding=\"async\" alt=\"HDMI cables being held \" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=contain&w=750&h=422&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=contain&w=750&h=422&dpr=2\" style=\"width: 100%; height: 100%; object-fit: contain;\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><li class=\"splide__slide gallery-main-img\"><picture><source media=\"(max-width: 480px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=contain&w=705&h=397&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=contain&w=705&h=397&dpr=2\" \/><img width=\"1500\" height=\"844\" loading=\"lazy\" decoding=\"async\" alt=\"The USB-C connector on a Startech dock.\" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=contain&w=750&h=422&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=contain&w=750&h=422&dpr=2\" style=\"width: 100%; height: 100%; object-fit: contain;\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><li class=\"splide__slide gallery-main-img\"><picture><source media=\"(max-width: 480px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=contain&w=705&h=397&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=contain&w=705&h=397&dpr=2\" \/><img width=\"1500\" height=\"844\" loading=\"lazy\" decoding=\"async\" alt=\"A close up look at an HDMI cable \" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=contain&w=750&h=422&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=contain&w=750&h=422&dpr=2\" style=\"width: 100%; height: 100%; object-fit: contain;\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><li class=\"splide__slide gallery-main-img\"><picture><source media=\"(max-width: 480px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/08\/osom-privacy-cable-lifestyle-02-1.jpg?q=49&fit=contain&w=705&h=397&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/08\/osom-privacy-cable-lifestyle-02-1.jpg?q=49&fit=contain&w=705&h=397&dpr=2\" \/><img width=\"1500\" height=\"844\" loading=\"lazy\" decoding=\"async\" alt=\"OSOM Privacy Cable showing both USB-C ends\" 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srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cable-bundle.jpg?q=49&fit=crop&w=120&h=80&dpr=2\" \/><img width=\"334\" height=\"186\" loading=\"lazy\" decoding=\"async\" alt=\"Several HDMI cables being held in a bundle\" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cable-bundle.jpg?q=49&fit=crop&w=167&h=93&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cable-bundle.jpg?q=49&fit=crop&w=167&h=93&dpr=2\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><li class=\"splide__slide gallery-thumbnail-img\"><picture><source media=\"(max-width: 767px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=crop&w=120&h=80&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=crop&w=120&h=80&dpr=2\" \/><img width=\"334\" height=\"186\" loading=\"lazy\" decoding=\"async\" alt=\"HDMI cables being held \" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=crop&w=167&h=93&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=crop&w=167&h=93&dpr=2\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><li class=\"splide__slide gallery-thumbnail-img\"><picture><source media=\"(max-width: 767px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=crop&w=120&h=80&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=crop&w=120&h=80&dpr=2\" \/><img width=\"334\" height=\"186\" loading=\"lazy\" decoding=\"async\" alt=\"The USB-C connector on a Startech dock.\" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=crop&w=167&h=93&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=crop&w=167&h=93&dpr=2\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><li class=\"splide__slide gallery-thumbnail-img\"><picture><source media=\"(max-width: 767px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=crop&w=120&h=80&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=crop&w=120&h=80&dpr=2\" \/><img width=\"334\" height=\"186\" loading=\"lazy\" decoding=\"async\" alt=\"A close up look at an HDMI cable \" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=crop&w=167&h=93&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=crop&w=167&h=93&dpr=2\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><li class=\"splide__slide gallery-thumbnail-img\"><picture><source media=\"(max-width: 767px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/08\/osom-privacy-cable-lifestyle-02-1.jpg?q=49&fit=crop&w=120&h=80&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/08\/osom-privacy-cable-lifestyle-02-1.jpg?q=49&fit=crop&w=120&h=80&dpr=2\" \/><img width=\"334\" height=\"186\" loading=\"lazy\" decoding=\"async\" alt=\"OSOM Privacy Cable showing both USB-C ends\" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/08\/osom-privacy-cable-lifestyle-02-1.jpg?q=49&fit=crop&w=167&h=93&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/08\/osom-privacy-cable-lifestyle-02-1.jpg?q=49&fit=crop&w=167&h=93&dpr=2\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><\/ul><\/div><\/section><\/div><div class=\"w-gallery-carousel-fullscreen\"><section id=\"main-expanable-carousel-1-2145659474\" class=\"splide splide-gallery\"><button class=\"lightbox__exit-btn close-btn icon i-close\" type=\"button\"><span class=\"txt\">Close<\/span><\/button><div class=\"splide__track lightbox__swipper\"><ul class=\"splide__list swiper-wrapper\"><li class=\"splide__slide gallery-main-img image-landscape\"><div class=\"body-img responsive-img\"><img width=\"2560\" height=\"1440\" loading=\"lazy\" decoding=\"async\" alt=\"Several HDMI cables being held in a bundle\" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cable-bundle.jpg?q=49&fit=contain&w=2560&h=1440&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cable-bundle.jpg?q=49&fit=contain&w=2560&h=1440&dpr=2\" style=\"width: 100%; height: 100%; object-fit: contain;\" class=\"img-brightness-opt-out\" \/><\/div><\/li><li class=\"splide__slide gallery-main-img image-landscape\"><div class=\"body-img responsive-img\"><img width=\"2560\" height=\"1440\" loading=\"lazy\" decoding=\"async\" alt=\"HDMI cables being held \" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=contain&w=2560&h=1440&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=contain&w=2560&h=1440&dpr=2\" style=\"width: 100%; height: 100%; object-fit: contain;\" class=\"img-brightness-opt-out\" \/><\/div><\/li><li class=\"splide__slide gallery-main-img image-landscape\"><div class=\"body-img responsive-img\"><img width=\"5953\" height=\"3969\" loading=\"lazy\" decoding=\"async\" alt=\"The USB-C connector on a Startech dock.\" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=contain&w=5953&h=3969&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=contain&w=5953&h=3969&dpr=2\" style=\"width: 100%; height: 100%; object-fit: contain;\" class=\"img-brightness-opt-out\" \/><\/div><\/li><li class=\"splide__slide gallery-main-img image-landscape\"><div class=\"body-img responsive-img\"><img width=\"2560\" height=\"1441\" loading=\"lazy\" decoding=\"async\" alt=\"A close up look at an HDMI cable \" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=contain&w=2560&h=1441&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=contain&w=2560&h=1441&dpr=2\" style=\"width: 100%; height: 100%; object-fit: contain;\" class=\"img-brightness-opt-out\" \/><\/div><\/li><li class=\"splide__slide gallery-main-img image-landscape\"><div class=\"body-img responsive-img\"><img width=\"2100\" height=\"1400\" loading=\"lazy\" decoding=\"async\" alt=\"OSOM Privacy Cable showing both USB-C ends\" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/08\/osom-privacy-cable-lifestyle-02-1.jpg?q=49&fit=contain&w=2100&h=1400&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/08\/osom-privacy-cable-lifestyle-02-1.jpg?q=49&fit=contain&w=2100&h=1400&dpr=2\" style=\"width: 100%; height: 100%; object-fit: contain;\" class=\"img-brightness-opt-out\" \/><\/div><\/li><\/ul><\/div><\/section><section id=\"expanded-gallery-thumbnails-1-2145659474\" class=\"splide gallery-thumbnails-expanded\" aria-label=\"The carousel with thumbnails. 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data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cable-bundle.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cable-bundle.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" \/><img width=\"290\" height=\"170\" loading=\"lazy\" decoding=\"async\" alt=\"Several HDMI cables being held in a bundle\" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cable-bundle.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cable-bundle.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><li class=\"splide__slide gallery-thumbnail-img-expanded\"><picture><source media=\"(max-width: 480px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" \/><source media=\"(max-width: 767px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" \/><source media=\"(max-width: 1023px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" \/><img width=\"290\" height=\"170\" loading=\"lazy\" decoding=\"async\" alt=\"HDMI cables being held \" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/01\/hdmi-cables.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><li class=\"splide__slide gallery-thumbnail-img-expanded\"><picture><source media=\"(max-width: 480px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" \/><source media=\"(max-width: 767px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" \/><source media=\"(max-width: 1023px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" \/><img width=\"290\" height=\"170\" loading=\"lazy\" decoding=\"async\" alt=\"The USB-C connector on a Startech dock.\" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/12\/startech-usb-cable-5.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><li class=\"splide__slide gallery-thumbnail-img-expanded\"><picture><source media=\"(max-width: 480px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" \/><source media=\"(max-width: 767px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" \/><source media=\"(max-width: 1023px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" \/><img width=\"290\" height=\"170\" loading=\"lazy\" decoding=\"async\" alt=\"A close up look at an HDMI cable \" data-img-url=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" src=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2026\/02\/hdmi-cable-close-up.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" class=\"img-brightness-opt-out\" \/><\/picture><\/li><li class=\"splide__slide gallery-thumbnail-img-expanded\"><picture><source media=\"(max-width: 480px)\" data-srcset=\"https:\/\/static0.xdaimages.com\/wordpress\/wp-content\/uploads\/wm\/2023\/08\/osom-privacy-cable-lifestyle-02-1.jpg?q=49&fit=crop&w=145&h=85&dpr=2\" 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The vision with the introduction of HDMI Alt Mode was native HDMI without the dongle. The HDMI licensing administrator wanted to eliminate the need for expensive active adapters that convert signals, so HDMI Alt Mode was born. It works by having the source device, whether that’s a phone or laptop, detect an HDMI display and reconfigure its USB-C pins to output raw HDMI signals. This means you could buy a $5 passive cable that behaved exactly like a standard HDMI cable.
Once swapped, it supports consumer electronic control, audio return channel, and even HDMI Ethernet, features that are often stripped out when using standard adapters. HDMI Alt Mode was the true king of connecting your phone to a TV, and when it finally did launch it was dealt a devastating hand.
HDMI Alt Mode was slow to launch, meaning by the time they did release, VESA already had DisplayPort Alt Mode in the market. HDMI Alt Mode was stuck at HDMI 1.4b specs, which is 4K at 30 Hz; however, DisplayPort Alt Mode could already handle 4K at 60 Hz and was much easier for manufacturers to implement because it was already built into the core USB 4/Thunderbolt specifications.
As a result, manufacturers didn’t want to pay the extra licensing fees or add the hardware logic for a slower redundant HDMI mode when they could just use DisplayPort for everything. This made HDMI Alt Mode practically redundant.
The nail in the coffin
Rest in peace HDMI Alt Mode
As of CES 2023, the HDMI licensing administrator admitted there are virtually no products actually using native HDMI Alt Mode. Most USB-C to HDMI cables you buy today are actually DisplayPort to HDMI converters. They contain an active chip in the connector that translates the DP signal to HDMI. Ironically, if you’re already using a USB-C to HDMI cable right now, you aren’t actually using HDMI Alt Mode to do it.
Another frustrating point of contention with HDMI Alt Mode was user frustration because it was made optional. Consumers never knew if their phone actually supported it even in 2026, on Google Pixels that famously do not support native HDMI output over USB-C, forcing users into the Chromecast ecosystem. The outcome became a plug-and-play dream that died because the plug, in the form of USB-C, looked the same but the play, which was the protocol, was hidden behind a wall of confusing technical specifications. Yet again, crushing our dreams of one cable fits all.
This was the final nail in the coffin for HDMI Alt Mode. As a result, most major accessory brands, including Anker and Ugreen, use DisplayPort Alt Mode exclusively because it works on mini or modern laptops and Samsung DeX. Not only was HDMI Alt Mode slow to launch, but then it finally did, there was a bigger and better competitor on the market that just dominated.
An era which we left behind
DisplayPort has dominated the game
HDMI Alt Mode is a relic of an era when we thought every protocol needed its own lane in the USB-C port, but fast-forward half a decade, and it has become completely redundant. We don’t need a native HDMI mode in 2026 because DisplayPort has become the language of the USB-C port and active connectors have become cheap enough that we just no longer notice them.
If you’re using a USB-C to HDMI cable, check the HDMI end of it. If it’s slightly longer or thicker than a standard HDMI plug, it’s likely housing an active conversion chip that you probably didn’t even know was in there. However, if your cable is capped at 4K at 30 Hz, it might actually be one of the rare ancient passive HDMI Alt Mode cables.
