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You’ll usually find it on the home screen. This method will forward all incoming calls to a different phone number. If you only want to forward phone calls in certain situations (such as when you’re on the phone or unavailable), skip to the last step for instructions. It’s near the middle of the menu. It’s toward the bottom of the “CALLS” section. This opens a new blank below. If you don’t see a switch or see a perpetually-spinning wheel, you’ll need to contact your mobile carrier to enable call forwarding. The keypad will appear. This is the phone number that your incoming calls will be forwarded to. It’s at the top-left corner. This saves your changes and adds a new icon to the status bar at the top of the screen. As long as your calls are being forwarded, a tiny icon of a phone receiver with a right-pointing arrow will be visible in that bar. To disable call forwarding, return to the Call Forwarding screen and toggle off the switch. You should only complete this step if you want to forward calls only in specific situations (such as when you’re unreachable). Since there’s no option to specify these situations in the Phone app, you’ll have to dial a code, followed by the phone number:   Forward if you don’t answer:  **61*1+PhoneNumber# To disable, dial ##61#   Forward if you’re unreachable:  **62*1+PhoneNumber# To disable, dial ##62#   Forward if you’re on another call:  **67*1+PhoneNumber# To disable, dial ##67#

Summary:
Open your iPhone’s Settings . Scroll down and tap Phone. Tap Call Forwarding. Slide the “Call Forwarding” switch to On . Tap Forward To. Enter the forwarding phone number. Tap < Call Forwarding. Set up call forwarding for specific situations.