How To Call Forward On iPhone

The iPhone has on-demand call forwarding built-in. This allows you to easily forward all phone calls to another number temporarily, and then turn that back off when you are ready to take calls again.

1. From the Home screen, tap the Settings icon
2. Scroll down and tap Phone
   
3. Tap Call Forwarding
   
4. Flip the Call Forwarding switch to On, then tap on the Forward To textbox
   
5. Use the virtual keypad to enter the number where you want incoming calls to ring
   
6. Tap the Call Forwarding button to return to the main Call Forwarding screen

You can tell if call forwarding is enabled by looking for this icon in the status bar.

To turn it call forwarding off just follow the same steps, but in step 4 flip the Call Forwarding switch to Off.