The news said that Apple iPhone 16 Pro entered the development stage of ＂Proto2＂.

　　Original title: The news said that Apple iPhone 16 Pro entered the development stage of "Proto2": adding a photo button and not magnifying the operation button.

　　IT house news on January 13th, according to foreign technology media.
MacRumors reported that the iPhone 16 Pro entered the "Proto2" development stage, and Apple decided to abandon the previous prototype design, operation button design and iPhone 15 Pro.
Similar models.

　　IT House quoted the media report that Apple tested four button configurations and two sizes in developing the iPhone 16 Pro model:

　　Uniform volume button with small size operation button

　　Unified volume button with large operation button and new photo button.

　　Independent volume button, large-size operation button and photo button are flush with the border.

　　Independent volume button, small size operation button, photo button and border are flush.

　　The earliest prototype of iPhone 16 Pro adopted Project Bongo.
In the project design, there is a unified volume button and a small multi-function operation button, both located on the left, and the power button is located on the right. However, due to unsatisfactory test results and high hardware failure rate, Apple gave up this design.

　　However, part of the Bongo project design, that is, the unified volume button, appeared in the early design of iPhone 16 Pro.

　　iPhone 16 Pro
The second prototype also uses a unified volume button, but it has a larger operation button, which is close to the volume button. The prototype also added a photo button below the right side of the power button.

　　Later prototypes (as shown above) used independent volume buttons instead of a unified button design. Apple plans to add capacitive operation buttons and photo buttons to these new products, both of which are flush with the frame and adopt force sensor technology.

　　In the latest "Proto2" design, Apple changed the operation buttons again. Now, Apple has adopted a smaller operation button with iPhone 15 Pro.
The operation buttons on the are basically the same, and the larger flush appearance is abandoned.

　　Although it is unclear how this will affect Apple’s future capacitive operation buttons, such a major design change indicates that it has been cancelled or postponed to future iPhone versions.