Although the workaround for space-constrained devices is to download and install iOS 8 using iTunes on a Mac or Windows PC, many iPhone and iPad owners don't have a clue about how to do that — especially people new to the platform since October 2011, when Apple instituted over-the-air updates that circumvented the hassle of connecting devices to computers.
iOS 8 can be downloaded over the air from iPhones, iPads, iPad Minis and iPod Touches, or through iTunes. From an iPhone, for instance, users must touch the "Settings" icon, then the "General" button on the resulting screen. Tapping "Software Update" will kick off the update process.
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