iOS 13 is officially dropping on September 19th, and it’s filled with welcome features, including a brand new dark mode and a special iPad version called iPadOS. But as with all big Apple updates, a new iOS means that some devices will be left behind, no longer able to upgrade their operating systems. 

This phase-out is largely due to hardware restrictions. Older devices often don’t have the storage space, RAM, or features required to run mobile the way that the new iOS requires. So they’re stuck behind the updates, and will eventually start losing support for apps and services over the coming years.

Continue reading to browse all of the devices that won’t be able to use iOS 13. If you have one of these devices, iOS 13 is beyond your reach, and it may be time to start planning for a replacement.