Tried it and am still waiting for the second message with tracking info. But so far everything you mentioned has been spot on.Hello everyone. I texted “phone shipment” to 934489 and received an auto-notification “Once your order ships we'll send you your tracking details.”
A minute later I received a text from Fedex with confirmation and tracking.
This is for Xfinitymobile pre-order of iPhone 15 Pro.
Worth a shot. Enjoy your new phones!