Your address book is only kept on your computer. It's kept by the specific web browser (Internet Explorer, Firefox, Safari, etc) you use to send an SMS. (In technical terms: The address book is kept in a “cookie”.)

If you send an SMS from a public computer we recommend deleting your address book after use.

You will not be able to use the same address book if you:

• Use a different type of web browser on the same computer.
• Use a different computer.
• Use certain security software, or browser settings, that automatically block or delete browser cookies.
• Delete cookies set by this website.