Apple has given the device an IP67 certification. This means that your device is dust tight and also water resistant. So it's no problem to make a phone call when it's raining or to look for directions during a rainstorm. However, it is not recommended to use the device in the shower or to go swimming with it. This can cause damage because the water pressure will be higher. Also be careful when charging: make sure your iPhone is completely dry when you charge it.
3D Touch is a function of Apple that can detect how hard you press on your screen. This opens up a whole new world of control over your phone! With normal touch, what you are used to happens. When you press a little harder you can see an example. When you press even harder, this example changes into a full screen display. For more information and useful applications see the Tips & Tricks!
If you have bought this device new, it may appear that the phone's speaker and/or microphone is not working. For example, you may not be able to hear the other party on the phone. This is because this model comes with a protective foil around it. The foil also covers the loudspeaker and microphone, making it seem as if these parts are not working properly. Remove the foil from the front and back to be able to make good use of your phone.
The stainless steel ring around the home button measures changes in voltage and therefore detects a slight touch of the home button. At that moment the sensor becomes active. It is not necessary to lay your finger flat on the scanner, it can be recognised from several angles. The software reads the reliëf of your finger. You can set multiple fingers on one device.
Via Settings > General > Touch ID & Password you can select that you want to protect your device with a fingerprint. Touch ID can also be used to make purchases from the App Store, iTunes, or iBooks.
Apple came up with a feature to be able to operate a larger screen with only one hand, called 'Reachability' or 'accessibility'. Tap the Touch-ID twice (the home button) and the screen lowers a little. This way, you can also easily click on apps at the top of the screen. Make sure that you do not press the Touch-ID all the way down, but only touch it. Otherwise, the app chooser will activate instead of the accessibility. With this feature, the device remains easy to operate with just one hand.