Use of Apple Card in over-the-phone transactions

The Wallet App on your iPhone will generate a one time CVV / security code for every transaction.

You can also change the card's virtual number at any point if required by requesting a new number. This is a virtual number you can use with online purchases and other transactions that request the full 16 digit card number. It is not the actual physical number for the card.

See here: Manage your Apple Card account - Apple Support

Yes.

As suggested here with the line: "the Physical card number is different to the "card" number..." The "card" number being the one you can see and the one you can change.

https://support.apple.com/en-us/HT209225#cardnumber

And yes locking appears to be easy as well.

Unless you know the person you're giving your card number to personally and trust them with your financial information, it's not "secure" at all. No such transaction is.

The one-time number is done with regular purchases, to my understanding. Using the card over the phone would be subject to the same things that any physical card would be subject to. After reading all the information available, it is really designed for using either in the Wallet, or through Apple Pay. You can contact Support if you wish by tapping on the 3 dots in the upper right corner after selecting the card, and you can either message or call. Another poster wrote about using the Message to ask a question and received a detailed response very quickly. See this for additional information, Apple Card - Apple

Yes you can. it is as secure as any other purchase.

I've been trying to figure out if changing the card number in the app would affect the physical card... sounds like it wouldn't.

Edit: Clarification: The physical card would still remain usable...? I think...

Every purchase made using Apple Pay uses a unique one time code.

Yes, replying to myself.

Having a card reader handy, I can definitively say that the number in the mag-stripe on the physical card does NOT match the number provided in the app... If the number is compromised after having given it out of the phone, changing it is a snap...

If the card itself is compromised (by a skimmer, etc), locking it and requesting a new one is also easy.