How can we have multiple Phone number fields for Signer 1?

Greetings!

The quickest solution would be to just increment the phone field name:

{{phone1_es_:signer1}}

{{phone2_es_:signer1}}

{{phone3_es_:signer1}}

A (perhaps) better method would be to identify the location of the phone:

{{Mobile_phone_es_:signer1}}

{{Home_phone_es_:signer1}}

{{Work_phone_es_:signer1}}