Google Voice from Google allows you to bind the free voice mail service to your existing mobile phone number, or you can get a new phone number from Google. Google Voice has many cool features! To name a few — listen to your voice messages on computer and on your mobile phone, voice messages are automatically converted to text messages so you can read them in your email inbox and on your mobile phone, you get to save your voice messages as long as you like, voice messages can be searched easily, customize different voice greetings for different friends and family members, and when you move your mobile phone service to a different phone company, your voice messages will move with you.
This is an awesome service and it’s free, but you need an invite from someone who has a Google Voice account in order to use Google Voice yourself. I suspect this is only a temporary limitation as Google is still enhancing the service and testing to see how reliable the service is, according to the number of the accounts. When Google gets everything nail down, Google Voice may allow just about anyone to sign up for the service. Will there be ads on Google Voice’s free accounts? Only Google would have known the answer to that, but I suspect that Google may push ads onto Google Voice for free account holders.