In a follow-up post, Bu
says the iPhone 15 Pro models “could” come with a Thunderbolt cable, which would support speeds of up 40Gbps. However, Apple doesn’t supply a Thunderbolt cable with the iPad Pro, so it wouldn’t be surprising to supply a standard USB-C 2.0 cable with the higher-end iPhones, despite rumors that Apple will support Thunderbolt transfer speeds.
That means iPhone 15 Pro users would need to buy a separate cable to take advantage of Thunderbolt speeds, which
Apple currently sells for $39. However, Bu claims that iPhone 15 cables will not be MFi (Made for iPhone) so any Thunderbolt 4 cable will work properly.