The iPhone 5s and 5c go on sale tomorrow, but even when you've got them in your hands, they won't be quite ready to go. That's because both need an update to the operating system as soon as you break them out of the box.
Early reviewers have spotted code that says the new phones will have to be updated to iOS 7.0.1.
This update addresses an issue with the Touch ID fingerprint scanner on the 5s. It's not known whether it brings other fixes as well.
iOS 7.0.1 is expected to go up for download tomorrow, as the 5s and 5c hit shop shelves.
iOS 7 was released yesterday, for the iPhone 4 and later, the iPad 2 and later, and the fifth generation iPod touch.
As is inevitable on day one, anyone downloading has suffered lengthy waits and plenty of error messages. So if you haven't had any luck yet, maybe give it a day or two.
The iPhone 5s features new imaging skills and a fingerprint scanner for added security and easier online shopping.
The 5c, meanwhile, is the most colourful iPhone ever made. Cases for the iPhone 5c are delayed, with a delivery time of between one and two weeks.