The iPhone 15 Pro & Pro Max support 10Gb/s USB-C data transfer speeds, but users will get a USB 2.0 cable in the box

iPhone 15 and USB-C: everything you need to know

iPhone 15 Models Do Not Come With Rumored Color-Matched Braided USB-C Cables - MacRumors

iPhone 15 Pro Max

The iPhone 15 and 15 Pro Have USB-C, but There's a Huge Speed Difference

USB-C and the iPhone 15: All of your questions answered

What Is USB-C? USB Specifications and Generations

iPhone 15 Pro Supports USB 3 Speeds, But Only If You Buy an Extra Cable

iPhone 15 pro - USB-C definitely NOT operating at USB 3.2 gen 1 speeds (10gbps) data transfer is still just as slow as USB 2.0 / lightning cable.

240W USB-C Charge Cable (2 m) - Apple

USB-C explained: How to get the most from it (and why it keeps on getting better)

iPhone 15 Pro USB C speeds tested: USB 3 cable vs stock cable, does it make a difference? - PhoneArena

iPhone 15 Pro USB C speeds tested: USB 3 cable vs stock cable, does it make a difference? - PhoneArena

Apple iPhone 15 Pro Max - Cellular Sales

3A METAL USB C 3.1 Type-C to USB C 3.1 Type-C Cable (10GB/s) Fast Charging Cord