Now that the holidays are over, we’re all returning to work and getting back into the regular swing of things. That includes Apple, which is now pushing out another iOS 9.2.1 beta to follow the one that it released in mid-December.

iOS 9.2.1 beta 2 is now available to registered developers as well as public testers in the Apple Beta Software Program. The update is build 13D14, up from the 13D11 build of the first beta, and it’s available to all of the devices that can run iOS 9. That means iPhone models back to the iPhone 4s and most iPads.

As with the last iOS 9.2.1 beta, it’s unclear exactly what changes Apple is making with this new update. Because it’s an x.x.1 update from iOS 9.2, though, it wouldn’t be a surprise if iOS 9.2.1 consisted mostly of bug fixes, performance improvements, and other under the hood tweaks. If you’re an iOS developer or public tester, you can download iOS 9.2.1 beta 2 now and try to find out for yourself what’s inside.