To set up call forwarding on Apple's mobile phone, you need to open the settings in the mobile phone first, then turn on the mobile phone, then turn on call forwarding to turn on call forwarding, turn on transfer to, and then fill in the mobile phone number to be transferred.

How to set up call forwarding for iPhone7plus:

1. First, click the settings icon on the phone desktop.

2. Then click Phone Options.

3. Then click Call Forwarding Options.

4. Then click the button on the right of call forwarding to open.

5, and then click the custom option, transfer from the needed place.

6. Then click the transfer option below.

7. Enter the number to be transmitted, and the setting is complete.