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Apple is releasing the newest version of its operating system today, iOS 7, for some versions of the brand's mobile devices.

The newest iOS is not compatible with every Apple device. For iPhones, 4, 4S, and 5 the tech company s latest release will work. The most recent iPod Touch is the only one that will work with iOS 7. All iPad models but the original are compatible with the changes.

Apple didn t give an exact time for the release, but it should be available to download for freesometime Wednesday, likely in the morning.

Planning to upgrade to iOS 7? Check out Geekwire s advice to make sure you (and your device) are ready for the change.

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