This FAQ is for Skype 5.2 for Windows and above. For other versions:
                    You can add a phone or mobile number to a contact and then 
                      call or text them from Skype with a little Skype 
                      Credit or a subscription 
                      (note that text messaging is only available with 
                      Skype Credit).
To add a phone number to a contact:
1. In your contact list, select the contact you want to add a phone number to.
2. Above the calling area, click the little arrow on the green Call button and select Add phone number.
                    .PNG)
3. Select a flag from the country-code dropdown list, and then type in a valid phone number.
                    .PNG)
                      4. Click  . 
                      The phone number is added to the contact.
. 
                      The phone number is added to the contact.
                    Learn how to call phones 
                      and mobiles.