On your iPhone, go to Settings > General > About and look at Model Name. If your phone isn't on the compatibility list, it will keep receiving iOS 18 security patches for a while, but you won't see ...

So, starting Sept. 15, the release day of iOS 26, the iPhone XS, XS Max, and XR will be the last in the line. With that out of the way, let's look at how to prepare your iPhone.