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Spotlight -- iOS' in-built search function -- works well, but it isn't pushed to its limitations. Named after its OS X counterpart, the desktop version is also marred by how much it could do but doesn't. There will be times where you simply want to search your phone for something, like a contact card or an email, but more often than not you turn to 'search' as your primary webpage. Spotlight could prefetch images and Web results as they are typed -- like a predictive Google search -- but also be turned off to prevent churning up a user's data plan./
Image credit: ZDNet.