Apple iPhone 15's USB-C Port Has Me Stoked, but There Are Downsides
Commentary: USB-C's versatility for charging and data transfer also comes with complications that millions of folks now will get to experience firsthand.
Stephen Shanklandprincipal writer
Stephen Shankland has been a reporter at CNET since 1998 and writes about processors, digital photography, AI, quantum computing, computer science, materials science, supercomputers, drones, browsers, 3D printing, USB, and new computing technology in general. He has a soft spot in his heart for standards groups and I/O interfaces. His first big scoop was about radioactive cat poop.
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I've been covering the technology industry for 24 years and was a science writer for five years before that. I've got deep expertise in microprocessors, digital photography, computer hardware and software, internet standards, web technology, and other dee
The utility and flexibility of USB-C are tainted by confusion over just what the heck comes along with that USB-C port on the side of a device and the cable you plug into it. In short, it's not always obvious whether your device or cable supports high-speed data transfer, high electrical power for fast charging, both or neither.
As the rumors predicted, the iPhone 15 will ship with a USB-C port and charging cable that'll give customers a taste of the trouble. That cable reportedly will be fine for charging but will transfer data at a mere 480 megabits per second, the poky speed that arrived with the USB 2.0 standard from 2000.
During its launch event, Apple conspicuously avoided saying anything about how fast the iPhone 15 USB-C port is, but the spec sheet says it's only the slow USB 2.0. The iPhone 15 Pro models will work at the more useful 10Gpbs speed of USB 3.
Watch this: How Apple's Switch to USB-C Will Change the iPhone
For most folks, the problem is likely to be merely an inconvenience. But it reflects the difficulties of the vast USB ecosystem, where the pressure to keep costs low is fierce and certification isn't required. USB-C is a much faster, more useful connection technology than the Apple Lightning port iPhone users have had since 2012, but Apple customers will have to endure some pain leaving the cozy Lightning world.
Apple didn't respond to a request for comment for this article. But it did tout this major change on what's arguably the single most important gadget on the planet. For one thing, USB-C means a single charging cable is all you need for many Apple devices. For another, you'll be able to use your iPhone to charge your AirPods. And on iPhone 15 Pro phones, you'll be able to record data-intensive 4K 60fps ProRes video to an external storage device.
The triple whammy USB mess
Part of the problem with USB is that the term actually refers to three separate standards. Let me explain.
The original standard, Universal Serial Bus, governs how devices identify themselves and send data across a connection. USB arrived in 1996 with a top speed of 12Mbps, but USB 2.0 was much more useful at 480Mbps, enough for printers and thumb drives. The first big speed jump after that was USB 3.0 in 2008 at 5 gigabits per second, better for external hard drives. Successors hit 10Gbps, 20Gbps, and most recently 40Gbps with USB 4. The upcoming USB 4 version 2 should reach 80Gbps. That's good for high-performance storage systems, fast networks and big, high-resolution monitors.
The next standard is USB-C, which refers only to the oval-shaped connector technology. Earlier in USB-C's history, it was common for Android phones to support only slow USB 2.0 data transfer speeds, though that problem has faded with newer models. The newest USB standard, USB 4.0, requires USB-C ports, so as time goes by, it'll be fairer to equate USB-C with high speed.
Last is USB PD, short for Power Delivery, which governs how USB is used for charging at rates up to 240 watts. Most devices don't require that much power, but they do need to know how to negotiate electrical matters -- for example, whether a portable battery should charge your laptop or vice versa.
Having three standards -- USB, USB-C and USB PD -- makes it harder to understand the abilities of all your devices and cables.
Worse, plenty of device manufacturers trying to cut costs and quickly ship products skip the certification process that the USB Implementers Forum offers. Unlike with Intel's Thunderbolt, which developed the fast data transfer approach in modern USB and uses its USB-C connector, there's no requirement to pass tests.
Low costs fuel USB-C's problems
Nobody wants to spend $60 instead of $15 for a USB cable. But be careful: You get what you pay for, roughly. It's more expensive to build cables that support high-speed data or high-power charging. One rule of thumb: Cables billed as "charging cables" in my experience don't bother with the extra cost of high-speed data support. That includes the USB-C cables Apple itself shipped with MacBooks for several years.
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One affordable cable I saw billed itself as a USB 4 product, but on deeper inspection, it turned out to support only USB 2.0 data transfer. Either the manufacturer was confused, lying or trying to argue that the cable would work in a USB 4 port even if it only supported slow data rates. (USB's good backward compatibility means slower, older products generally still work fine when attached to newer ones.)
I haven't struggled too much with the slow cable problem. Mostly, I use USB-C for charging, and my devices that need fast connections stay attached to their own fast cables.
But problems can happen. A couple of months ago, when I got a new Canon mirrorless camera, I was caught on a trip with slow cables that really bogged down the process of transferring photos to my laptop.
When USB-C is a problem and when it's not
The good news for future iPhone owners is that most of them won't have to care much about whether they have a slow cable. Indeed, iPhone 15 non-Pro phone owners won't be able to benefit from the speeds of a fast cable even if they have one.
Data rates were more important in the olden days when we used iTunes to sync music and photos between laptops and iPhones. Even as photo and video files have exploded in size with 50-megapixel phone cameras and 4K video, most of us get that data off our phones with mobile networks, Wi-Fi and AirDrop, not with cables.
That's the big reason Apple could mostly justify shipping an iPhone 15 with a USB 2.0 cable.
Now, for serious data hogs, the kind of person who's shooting many gigabytes of 4K ProRes video, a faster cable is useful. It's one reason I've been annoyed with the Lightning port on my iPhone. And it's one reason I'm irritated that Apple wimped out and shipped a slow USB-C cable even with its expensive iPhone Pro models.
Apple perhaps is concerned about confusing its own customers. Right now, it offers two options: slow charging cables and fast Thunderbolt cables. There's a big price difference: Apple's 1-meter Thunderbolt 4 cable, which supports 40Gbps speeds, costs $69.
There's no need to spend that much. You can get 40Gbps 1-meter USB-C cables that transfer data at 40Gbps for only a little more than $30. I'm partial to Anker, Plugable, Satechi and Monoprice, whose cables I've used for a few years.
But thanks to USB's messy history, you have to look at the specs carefully. You can save some money getting cables that only support 10Gbps or 20Gbps -- still plenty of capacity for an iPhone -- but 40Gbps is handy if you want to use the same cable to plug your PC into a big external display. And note that your efforts to future-proof your products have limits: The next USB version will reach top speeds of 80Gbps, and Thunderbolt 5 will require 80Gbps support when it arrives in 2024.
I prefer buying USB-C products that have passed USB-IF's compliance testing. I look for the USB-IF certifications, and I love it when companies like Plugable attach clear descriptive labels so we don't have to decode USB-IF icons. (And most products don't even have icons.)
USB-C transition less painful than Lightning
There was plenty of kvetching when Apple switched to the Lightning port, even though it was clear Lightning was superior to the bulky, fragile 30-pin connector that preceded it. I'm expecting more complaints with the iPhone's USB-C switch as people discover that all those cables they have stashed in glove boxes, office desks, school backpacks and bedside tables have become obsolete.
But the good news is that USB-C is already very well established, and not just on MacBooks and many iPads. The oval-shaped connector is on modern Android phones, Windows laptops, Nintendo Switch gaming consoles, iPad Pro and Air tablets, Sony noise-canceling headphones and countless other devices. There's a good chance a lot of us already have some spare USB-C cables lying around.
When I talk to USB-IF executives about the USB-C's labeling problems, they assure me that most people don't notice any sort of bother and that the gradually maturing technology will mean incompatibilities and product shortcomings eventually will slip into the back of our collective junk drawers.
I hope so. For me, the flexibility and power of USB-C is well worth the pain. But I do wish there wasn't so much pain.