Essentials

The things worth knowing before you buy.

Start here if you have a question about how iPhones work, not which one to get.

Apple's battery ratings are measured in a lab. Here's how long an iPhone battery actually lasts in real use, and when to replace it.

Running out of storage mid-vacation is worse than paying for space you didn't need. Here's how to pick the right amount.

Most people choose storage once and live with it for years. Here's how to get it right the first time.

Apple doesn't publish an end date for iOS support. Here's how long each iPhone model gets updates, and when support ends.