When you create your new account, before you place a call you will be prompted to enter in your phone number. This step will link your phone to your account.
To add additional phone numbers to your account:
1. Log into your jaxtr account at: URL: http://www.jaxtr.com/user/login.jsp
2. Under the My Account tab, select "Manage Phones",
3. Here you are able to enter in your phone number and select the type. Once complete click on the "Add Phone" link.
Your phone will now be added you to your account allowing you to use the assigned jaxtr numbers to call your friends and family.