Answer:
Your customer provided the wireless service provider an authorization to use the card. That authorization may be valid, even if it was not given in writing (see Comment 10(b)-7 in Regulation E's Supplement I). I don't think you have a Regulation E claim, but Visa rules may permit a recovery. In addition, your customer may have success taking the problem up directly with his wireless carrier, particularly if he promptly notified the carrier of the theft of his phone.
First published on BankersOnline.com 10/25/10