1. From the home screen, tap Settings.
   
2. Tap Phone.
   
3. Tap Call Forwarding.
   
4. To turn on Call Forwarding, tap the Call Forwarding toggle.
   Note: You must be in range of the cellular network when you set iPhone to forward calls, or calls won't be forwarded.
   
5. Enter the Desired forwarding number, then tap the Back arrow.
   
6. The Call Forwarding icon appears in the status bar when call forwarding is on.
   
7. To change the Call Forwarding number, tap Forward to.
   
8. Enter the Desired forwarding number, then tap the Back arrow.
   
9. To turn off Call Forwarding, tap the Call Forwarding toggle. Your settings will automatically be saved.