Two of Apple's latest iPhone 12 models went on sale in China on Friday, after early pre-order data showed strong consumer interest in the 5G-enabled device in the firm's second-largest market.

G will finally get its U.S. closeup with the expected debut of Apple Inc's next iPhone on Tuesday. But the blazing speeds promised will not materialize for most people.

Apple's iPhone Upgrade Program lets you easily upgrade your iPhone when a new model is released each year. Here's how to sign up for the program.