Skype suggests using its service to ring potential contacts on their mobiles or landline phones (see our guide for how to do this) to badger them to accept, but remember: Skype will charge you to make these types of calls! Step 4: Once the installation process is complete, it will � How do I add or change my primary email address in my Skype profile? If you have called that person before, you can just click the green call button.