**The series of model photos shows that the iPhone 15 still has 4 versions, many changes in design compared to the previous generation.** News site *MacRumors* has shared a video of the 4 versions of iPhone 15 being designed in hand. based on rumors. Compared with the iPhone 14, the iPhone 15 series has some notable changes in design. First, the connector below the device will switch from Lightning to USB-C. This is a move to comply with the European Union’s (EU) standardization of charging ports for mobile devices. The new port allows users to charge their iPhone with the cable of the MacBook and iPad. Although the shape of the port has changed, rumors say that Apple still maintains the Made for iPhone (MFi) program. That means some features like fast charging and high-speed data transfers will be limited to certified USB-C cables. The edges of the iPhone 15 are more curved, making it easier for users to hold the device. For iPhone 15 (right) and 15 Plus, the chassis still uses the same aluminum material as its predecessor. Meanwhile, the iPhone 15 Pro (left) and 15 Pro Max can use a titanium frame instead of stainless steel, the surface is roughed like the Apple Watch Ultra. This detail has not appeared on the model because titanium is an expensive metal, rarer than steel or aluminum. Another notable detail on the 4 iPhone 15 models is the matte glass back. It is not clear whether this is an error in the production of the model, or whether all iPhone 15 versions will actually feature this back. From iPhone 11 to iPhone 14, the matte glass surface only appears on the Pro series, while the standard models use glossy glass. Next, the Dynamic Island hole is expected to appear on all four iPhone 15 models, marking the end of the old-fashioned notch (notch). Currently, Dynamic Island is only available for iPhone 14 Pro and 14 Pro Max. Models of iPhone 15 Pro (left) and 15 Pro Max showing adjacent force-sensitive volume buttons. However, the latest rumor confirms this feature has been moved to the iPhone 16 due to technical issues. So, iPhone 15 Pro and 15 Pro Max will still use separate physical volume buttons as before. Meanwhile, the ring mode lever on the iPhone 15 (right) will be replaced by an Action button, similar to the button of the same name on the Apple Watch Ultra. Users can assign custom features to this part. If on schedule, iPhone 15 will be released in the next 4 months. That means the product design is complete to prepare for mass production. Other rumored improvements on the iPhone 15 include higher RAM capacity, only the Pro series uses the A17 Bionic processor chip and the new deep red color.