So if you have a new iPhone 15, install the iOS 17.0.3 update (it also has important security updates). If you haven’t bought one yet and plan to do so soon, the update should appear for ...

iOS 17.0.3 and iPadOS 17.0.3 are available for every iPhone and iPad model compatible with iOS 17 and iPadOS 17. This includes iPhone XR and later, and every iPad with an A10X chip or later.

It's unclear when iOS 17.0.3 will be released to the public, but the update will likely be available either later this week or next week.