What maximum speeds do the different iPhones support? The iPhone 12 range all support 5G as noted, with Apple claiming that they can theoretically reach speeds of up to 4Gbps in real-world conditions.
Apple iPhone 12 smartphone. Announced Oct 2020. Features 6.1″ display, Apple A14 Bionic chipset, 2815 mAh battery, 256 GB storage, 4 GB RAM, Ceramic Shield glass.