iOS 18 released: What iPhone models can't get the newest update?

(NEXSTAR) — It's mid-September which, as history shows, means another major iOS update has become available to Apple users.
Apple previewed Monday's expansive iOS 18 update during its World Wide Developers Conference in June. In addition to AI-powered features and changes to text messaging, Apple says the update will bring more customization options to the iPhone, expanding on features iPhone users saw last year with iOS 17. New iPhone 16 will have 2 more buttons: Here’s what th