Eternal Sunshine of the Spotless Smartphone

If your device is having difficulty completing tasks like file downloading, it's a dead giveaway that it needs some maintenance. We're used to the idea of spending a bit of time running hard disk defragmentation, spyware scans and other tools on our PCs, but we may not be so au fait with what's needed on the limited-memory phones and PC-substituting tablets we're using daily.

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