To set up Call forwarding on the device, from the home screen, select the Settings icon.
Scroll to and select Phone.
Select Call forwarding.
Swipe the Call fowarding toggle to activate Call forwarding. Note: You must be in range of the cellular network when you set iPhone to forward calls, or calls won't be forwarded.
Enter the desired forwarding number.
Select the back arrow to return to the Call forwarding screen when finished.
When Call forwarding is active, the Call forwarding icon will appear in the Notification bar.
To change the desired forwarding number, from Call forwarding, select Forward To.
Enter the new desired forwarding number.
To turn off Call forwarding, from Call forwarding, swipe the Call forwarding toggle to off.