The biggest loss you'll feel when switching from a traditional iPhone to the Duo is the latter's lack of a FaceID array for facial recognition. If you've grown accustomed to FaceID, which pretty much always works as long as your face is somewhere in front of the screen, losing that option could be a major blow. When unlocking your phone, making purchases and logging into apps requires fiddling with a finicky fingerprint sensor every time, it can become aggravating. On the other hand, some users still miss the older iPhones with TouchID. Maybe your face doesn't play nice with FaceID for whatever reason.

Apple Intelligence was the big news at the company's Worldwide Developers Conference back in June. Apple made good on a modest first wave of features in October. But iOS 18.2 -- along with sibling OS upgrades for Mac and iPad -- will bring a meatier set of Apple Intelligence features to Apple's suite of devices, including Genmoji, Image Playground and ChatGPT integration. To check out Apple's new AI, you must have an eligible device and run the current iOS 18.1, iPadOS 18.1 or MacOS 15.1. Once approved, you'll receive a notification saying it's ready to activate on your device.