Apple Tweaks iPhone 16 Pro Action Button Design as Early Development Continues

Recent iPhone 16 Pro prototypes seen by MacRumors indicate that Apple has again tweaked the design of the Action button, and now it looks much like the Action button found on the iPhone 15 Pro. Apple has been toying with the size and design of the Action button for the ‌iPhone 16 Pro‌, but in the latest "Proto2" development stage, the company is sticking with a tried and true design.

iPhone 16 Pro Left Side Feature
During the different ‌iPhone 16 Pro‌ development stages, Apple has tested four button configurations and two sizes for the Action button.

  • Unified volume button with small Action button
  • Unified volume button with large Action button and new Capture button
  • Separate volume buttons with large Action button and Capture button flush with frame
  • Separate volume buttons with small Action button and Capture button flush with frame (current)

The earliest known prototypes of the ‌iPhone 16 Pro‌ had a unified volume button and small multi-purpose Action button, both on the left side, with a power button on the right. This design was initially developed as part of Project Bongo, which was an attempt to bring haptic buttons the ‌iPhone 15 Pro‌. While the project was ultimately canceled due to unsatisfactory test results and high hardware failure rates, parts of the Bongo design, namely the unified volume button, found their way onto early designs of the ‌iPhone 16 Pro‌.

The second prototype variant of the ‌iPhone 16 Pro‌ also used a unified volume button, but it had a larger Action button that was close in size to the volume buttons. This prototype also had an additional "Capture button" on the right side below the power button.

iPhone 16 Side 2 Feature
Later prototypes (pictured above) featured separate volume buttons rather than the unified button design. With these more recent units, Apple planned to include a capacitive Action button and Capture button, both of which were flush with the frame and featured force sensor technology.

With the most recent "Proto2" design, Apple has once again changed the Action button. Apple has now adopted a smaller Action button that mirrors the Action button on the ‌iPhone 15 Pro‌, doing away with the larger, flush look. While it is currently unclear how this affects the future of Apple's work on a capacitive Action button, a design change as significant as this indicates it has been canceled or postponed for future iPhone iterations.

Although the information presented here accurately describes existing internal designs, it is important to note that additional design changes are always possible, and the information presented here may not reflect finalized design of the ‌iPhone 16 Pro‌.

For additional information on what to expect from the 2024 ‌iPhone‌ lineup, check out our dedicated rumor roundups for iPhone 16 and iPhone 16 Pro.

Related Roundup: iPhone 16 Pro

Top Rated Comments

macjonny1 Avatar
11 weeks ago
Getting harder and harder to get excited about any updates for years to be honest.
Score: 59 Votes (Like | Disagree)
scrapesleon Avatar
11 weeks ago
spending too much time on a simple button there are more important issue at hand lol
Score: 31 Votes (Like | Disagree)
mgz Avatar
11 weeks ago
Jesus, who gives AF how "Exciting" the design is? This is a device I use all day every day, I don't need the design to be "exciting" I need it to steadily improve and gain new functionality that is just as easy to use.

And yeah dude I think Apple is capable of working on more than button designs. Perhaps most of their work is going on in the INSIDE of the device?
Score: 28 Votes (Like | Disagree)
DCstewieG Avatar
11 weeks ago

I wish my iphone 12 pro max battery would last, i guess i will be forced to update.

Maybe....replace the battery?
Score: 27 Votes (Like | Disagree)
TruthAboveAllElse Avatar
11 weeks ago
I will not buy a new iPhone so long as the design is basically the same as the iPhone 12.
Score: 23 Votes (Like | Disagree)
RacMumors- Avatar
11 weeks ago
I'm not a fan of the current action button design/location.

The amount of times I've reached into my pocket to increase the volume on something and hit the action button by accident. The buttons are too close to each other and similar in shape.

Could they redesign the button? Move it to the other side? I dont know but the way it is now, doesnt work.
Score: 16 Votes (Like | Disagree)

Popular Stories

iPhone Home Screen Gradient Blank Spaces 1

Sources: iOS 18 Lets Apps Be Placed Anywhere on Home Screen Grid

Sunday March 24, 2024 1:33 pm PDT by
iOS 18 will give iPhone users greater control over Home Screen app icon arrangement, according to sources familiar with the matter. While app icons will likely remain locked to an invisible grid system on the Home Screen, to ensure there is some uniformity, our sources say that users will be able to arrange icons more freely on iOS 18. For example, we expect that the update will introduce...
iPad Pro 2024 Landscape Camera Feature

New iPad Pro Again Rumored to Feature Landscape Front-Facing Camera

Monday March 25, 2024 5:43 am PDT by
The next-generation iPad Pro will feature a landscape-oriented front-facing camera for the first time, according to the Apple leaker known as "Instant Digital." Instant Digital reiterated the design change earlier today on Weibo with a simple accompanying 2D image. The post reveals that the entire TrueDepth camera array will move to the right side of the device, while the microphone will...
sonoma desktop wwdc

Apple Releases macOS Sonoma 14.4.1 With Fix for USB Hub Bug

Monday March 25, 2024 10:10 am PDT by
Apple today released macOS Sonoma 14.4.1, a minor update for the macOS Sonoma operating system that launched last September. macOS Sonoma 14.4.1 comes three weeks after macOS Sonoma 14.4. The ‌‌‌‌macOS Sonoma‌‌ 14.4‌.1 update can be downloaded for free on all eligible Macs using the Software Update section of System Settings. There's also a macOS 13.6.6 release for those who...
iPhone 15 General Feature Green

Apple Says These New iOS Features Are Coming Later This Year

Sunday March 24, 2024 7:45 am PDT by
Apple has previously announced three new iOS features that it said are coming to the iPhone later this year, as outlined below. The new features include the ability to install iPhone apps on the web in the EU, RCS support in the Messages app, and next-generation CarPlay. Web Distribution Apple recently announced that eligible developers will soon be able to distribute their iOS apps to ...
Beyond iPhone 13 Better Blue Face ID Single Camera Hole

Seven Reasons to Wait for Next Year's iPhone 17

Tuesday March 19, 2024 5:20 am PDT by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models concurrently, which is why we sometimes get rumored feature leaks so far ahead of launch. The iPhone 17 series is no different, and already we have some idea of what to expect from Apple's 2025 smartphone lineup. If you plan to skip...
maxresdefault

iOS 18 Rumored to Feature 'More Customizable' Home Screen

Sunday March 24, 2024 7:10 am PDT by
iOS 18 will feature a revamped Home Screen that is "more customizable," according to Bloomberg's Mark Gurman. He revealed this information in his Power On newsletter today, but he did not provide any specific details. Subscribe to the MacRumors YouTube channel for more videos. Apple will announce iOS 18 at its annual developers conference WWDC in June. Other features and changes rumored for...
combine images

Top Stories: iOS 18's Generative AI Features to Rely on Google?, Latest on New iPads, and More

Saturday March 23, 2024 6:00 am PDT by
We're getting closer to the launch of new iPad Pro and iPad Air models, while rumors about iOS 18 are continuing to ramp up with this week's surprise revelation that Apple has been talking to Google and others about potentially helping power the generative AI features expected to be a major part of this year's update. Other news this week saw the release of iOS 17.4.1 and iPadOS 17.4.1...