Among a handful of other new features and improvements, iOS 5.1 lets users of the iPhone 4S, iPhone 4, iPhone 3GS and fourth-generation iPod touch access the camera even more quickly than what was possible under its 5.0 predecessor. To do so, simply press any button to bring up the device’s lock screen, then place your finger over the camera icon and slide up—as you do so, the traditional camera interface will appear underneath, giving…
