How to switch between cameras on an iPhone 4
The iPhone 4 is the first Apple handset to have more than a single camera, one of which faces away from the user and one of which faces towards the user. It’s easy to switch from one camera to another. Here’s how. First, some notes about [...]
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http://iphonetouch.blorge.com/2010/08/03/how-to-switch-between-cameras-on-an-iphone-4/