Why doesn’t my phone do swap calling

This link lists iPhone telephone features..Call forwarding, call waiting, and other call features on iPhone - Apple Support

I suggest you let Apple know that you would like to see the call swap feature in a future software update.

I believe this is a better answer to your question.........http://devicehelp.optus.com.au/apple/iphone-6-ios8/calls-and-contacts/using-call -waiting-on-my-mobile-phone/

Keyahjones25 wrote:

Why doesn’t my phone do swap calling

<Re-Titled by Host>

Hmm, what is "swap calling."

Let us know.