please disregard my last note.
Using a TEXT field, I went to Advanced tab and in Attributes I added TYPE and TEL.
after updating, the field still allows me to enter text and numbers are not formatted as a telephone number.
see here:
setting attribute - https://snag.gy/61TK29.jpg
number not formatted as phone number - https://snag.gy/gG3d2n.jpg
field accepts text vs numbers - https://snag.gy/mcPKxk.jpg