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Apple stops signing iOS 15.3.1, ending ordinary downgrades from newer iOS 15.4

Downgrade iOS 15

Following a rigorous beta period, Apple unleashed its iOS & iPadOS 15.4 software updates for iPhone and iPad last Monday with huge upgrades, such as being able to unlock an iPhone with Face ID while wearing a mask and support for Universal Control, among other things. As we come up on a full week after the release, it’s unsurprising to see that Apple has now stopped signing the previous release: iOS & iPadOS 15.3.1.

Apple Studio Display owners can upgrade the stand after purchase

In this marketing image from Apple, a creative professional is depicted sitting at their desk and using a Mac Studio computer connected to a Studio Display

The Studio Display is a brand new external monitor from Apple, and it went on sale not too long ago. Like many of the company's products, the accessory situation isn't the easiest to work with, even when it comes to just choosing a stand for your new external display. In fact, Apple's fine print on the new accessory suggests that choosing one stand option might lock you into that route completely. But it turns out that's not the case after all.