What and where is selective call forwarding

Hey there WENDORA59,

If you're looking to set up call forwarding on your iPhone, you'll want to first make sure this is something your carrier supports. Contact your carrier to check if you have call forwarding enabled with your service. Should your carrier say this is not available for your device, then there would not be any way to use call forwarding.

If you have this enabled, continue with the steps below to set it up:

1. Go to Settings  > Phone.

2. Tap any of the following:

• Call Forwarding:  appears in the status bar when call forwarding is on. You must be in range of the cellular network when you set iPhone to forward calls, or calls won’t be forwarded.

On models with Dual SIM, choose a line.

• Call Waiting: If you’re on a call and call waiting is turned off, incoming calls go directly to voicemail.

On models with Dual SIM, call waiting works only for incoming calls on the same line, unless the other line has Wi-Fi calling enabled and a data connection is available. See Set up cellular service on iPhone.

For information about conditional call forwarding (if available from your carrier) when the line is busy or not in service, contact your carrier for setup information.

Set up call forwarding and call waiting on iPhone - Apple Support

Take care!