For Seniors: Use the Keypad to Place iPhone 4S Calls
Dialing a call with a keypad is an obvious first skill for you to acquire, and it’s dead simple. On any iPhone 4S Home screen, tap Phone in the Dock, and the keypad appears. (If anything other than the keypad appears, you can just tap the Keypad button at the bottom of the screen to display the keypad.)
Enter the number you want to call by tapping the number buttons; as you do, the number appears at the top of the keypad.
If you enter a number incorrectly, use the Delete button on the keypad (a backward-pointing arrow with an X in it) to clear numbers one at a time.
The call is placed, and tools appear.
When you enter a phone number, before you place the call you can tap the Add Contact button to the left of the Call button to add the person to your Contacts app. You can create a new contact or add the phone number to an existing contact using this feature.
If you're on a call that requires that you punch in numbers or symbols such as a pound sign, tap the Keypad button on the tools that appear during a call to display the keypad.
When you’re on a phone call, the Call button changes to a red End button. Tap End, and the call is disconnected.