You iPhone gives you a lot of options when it comes to making phone calls, and it makes it easy to access the Phone app when you're most likely to need it. Here are some of the fastest ways to call.
Add a phone number to your Favorites list:
The Favorites list acts like a speed dial system on other phones. You can use it to store your most frequently used numbers, and even add e-mail addresses for contacts you want to use FaceTime with.
Whenever you call someone, your name and number will likely appear on their screen. If you would like to stay anonymous, you can turn off your iPhone's caller ID feature. Here's how:
FaceTime is a cool video call feature that comes with the newest iPhone, iPad and iPod touch and uses the front-facing camera. This means we can see and talk to people at the same time just like in old movies about the future. There are a couple of limitations, however. The other caller must also have FaceTime over a Wi-Fi connection, or they must have FaceTime installed on their Mac. 
Making conference calls is super easy with the iPhone. Follow these steps:
