If you don't want to leave your phone number, put in a fake one. I don't need it anyway and don't know how to disable the requirement. ALSO I CAN TAKE VENMO AT "claire-was-here" last 4 digits 7333 (it will come up as Claire Vohman)
TO DO VENMO, SELECT "PAY BY CHECK" AND THEN JUST DON'T SEND ME A CHECK! I'll see the Venmo payment and also your order. VOILA!