The account subscription and SIM were ordered for my froend Lisa on July 9. We cannot activate the account without the physical SIM card # and going with an e-SIM does not seem to be an option at this point.
I use a Samsung S20 (with 5G). AT&T data seems to work bit calls don't go through. I don't know much about VoLTE, but I would think the S20 would be compatible.