I know when signing up for some freebies, some sites ask for a phone number. I use k7.net this way I still have a valid phone number and don’t use my cell or home number. Best part its FREE (K7 will give you your own personal phone number) to use and also I use this in my personal life. People are able to leave you a voice mail message and you are notified by email when someone has done so. Also you can receive faxes. K7 This really comes in handy!!