Upgraded your iPhone? Here are some changes (MoneyWatch) If you're an iPhone user, you might have recently made the switch to the new iPhone 5. The new model isn't radical departure, but there are significant changes under the hood you should be aware of. Even if you didn't get a new phone, though, the new version of the operating system -- iOS 6 -- can put a new coat of paint on your older phone. Since the settings app isn't a place you're likely to browse, here's a guided tour of what you should know Bluetooth is easier to locate. I always thought it was odd that Wi-Fi controls were right on top in the iPhone's settings, while Bluetooth controls were buried in the General section. No longer. Now Bluetooth and Wi-Fi are adjacent at the very top of settings, which is handy when you need to switch Bluetooth inputs. "Do not disturb" lets you turn off all notifications. As I explained last week, the new "do not disturb" feature mutes all communication whenever you like (as necessary or on a schedule). When that feature is on, the phone won't light up when texts, emails, phone calls or other notifications arrive. Create reply with messages. Can't take a call? Swipe the options button when your phone rings and choose from among a few canned messages to text to the caller. You can customize those messages by choosing "phone in settings" and then editing "reply with message." Log into Facebook. Facebook is finally integrated in the iPhone 5 at the operating system level. Scroll down to Facebook and log in so you can post stuff on your wall without opening a specific Facebook app. Now you can do it from the place that you want to share, like Photos. Enable FaceTime over 3G. With an appropriate data plan, you can now make FaceTime, or video, calls over cellular instead of being limited to Wi-Fi. Scroll down to FaceTime and enable "use cellular data. You'll then be asked to contact your carrier to make sure your service is enabled.