Cupertino technology king, Apple, has just released the latest version of iOS for iPhones, iPads, and iPod touches. A fork to this year's major iOS 7 update, iOS version 7.0.4 comes with a slew of bug fixes and performance improvements. But, specifically, Apple intended the update to fix the numerous reported hanging FaceTime calls.
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We haven't really experienced the said problem on our end, but affected users should find relief in the update. As usual, you may update via OTA. The easiest path is to check "Settings," then "General," and "Software Update." Let us know if the update worked for you.