Look, we know iPhone updates aren't exactly the sexiest topic when it comes to technology but in terms of personal security, this new one is a biggie.
You may have seen your iPhone or iPad prompt you to update your software to iOS 9.2.1. A small thing and judging by the incremental nature of it, almost certainly something many of us will simply dismiss.
That would be a mistake however as iOS 9.2.1 is far more important than its humble description suggests.
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The update provides a fix to a security bug that was first discovered in 2013. The flaw would allow hackers to steal credit card information or passwords by creating a malicious WiFi network and then forcing people to sign in (as you would on the tube or the pub) through a landing page.
Along with this fix the new security-focused update deals with a number of flaws that were discovered by Google's 'Project Zero' bug team.