I used the interface to alter the validations on phone number in confirm_cart.php to:
$WAFV_Errors .= WAValidateAN((isset($_POST["Phone_Number"])?$_POST["Phone_Number"]:"") . "",false,false,true,true,"+,.()",false,4);
so it was alphanumeric and would accept blanks, '+', and a couple of others.
I also adjusted the pattern statement to ""; but that did not work. I also tried deleting it altogethe which also did not work.
I currently have the situation that when I click submit the page refuses to advance so I can insert credit card information.