[13] Apple had already started to introduce USB-C to its handheld devices beginning with the third generation iPad Pro, released in 2018.

[16] It features a redesigned Apple graphics processing unit (GPU) which adds hardware-accelerated ray tracing; during the reveal event, Apple announced that games such as Death Stranding, Resident Evil Village and Assassin's Creed Mirage (all games originally designed for consoles and PCs) would come to iOS in the future.

[20] All iPhone 15 models have support for DisplayPort Alternate Mode over USB-C video output with HDR up to 4K resolution.

Other options include opening the camera, recording a voice memo, or toggling a focus mode and more.

[24] Consistent with the UK Product Security and Telecommunications Infrastructure regulations, it will continue to receive major software updates for a minimum of five years to at least 2028.

[25] Some owners claimed that their iPhones were suffering from overheating issues,[28] reportedly reaching temperatures as high as 47 °C (117 °F).

[33] Some owners have found that power banks designed for USB-C devices are not working correctly with the iPhone.

A later video, published by the same YouTuber, cited that the possible reason for this was that the back glass is no longer glued to a metal plate; this change, and the hollow spots on the phone, may cause the back glass to crack if pressure was applied on those hollow spots; on the durability test video, in some angles, the glass is noticeably caved in to the phone, further proving that it broke due to a hollow spot on the phone.

[37] Additional testing by Consumer Reports found that the durability of the iPhone 15 Pro Max was generally excellent, with the back glass not breaking after 50 drops.

While its display, camera and speakers were praised, its high price was noted as a weak point.