20 Key iPhone Settings to Change (2025)

Apple's software design strives to be intuitive, but each iteration of iOS contains so many additions and tweaks that it's easy to miss some useful iPhone settings. Apple focused on artificial intelligence when it unveiled iOS 18 in 2024, but there's a lot under the hood that adds to the steady stream of intriguing customizations and lesser-known features from the last few years. Several helpful settings are turned off by default, and it's not immediately obvious how to switch off some annoying features. We're here to help you get the most out of your Apple phone. Once you have things set up the way you want, it's a breeze to copy everything, including settings, when you switch to a new iPhone.