All four iPhone 15 samples are equipped with a USB port C, but only two levels of high-speed support.

According to Ming-chi Kuo’s analysts, two 15 Pro and 15 Ultra will support the 3-2 USB drive and even Thunderbolt three, in which, uh, an iPhone 15 and 15 Plus, is still on the current USB-0-0-2-2-2-USB supply. Genetic speed of a 2-0-0 drive at 480 Mb/seconds, while the 3-2 drive is 20 Gb/seconds and five to 40 Gb/seconds.
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