CRM 2013 new format = "Phone"

Hi All,

In the new CRM 2013 there is a phone format type called “Phone” which let us call directly from the phone field via Skype.in the Contact entity most of the Phone fields have phone format except telephone3 and all of the Account phone fields doesn’t have a format of Phone. I am wondering to create a new phone field (telephone1, telephone2, telephone3) on the account record and make the format Phone but want to know its impact since these fields are OOB fields and I believe these fields might be used in integrated with outlook. If you have any idea how to change these fields to phone format please advise me.

Thanks,