This driver comes with Snapdialer software. It enables a Sprint PCS subscriber with a Samsun N400 cell phone to access the internet and browse or send/receive email. The dialer must call #777 to get to the internet. STMP email setting should be for your mail email provider. It took a while to get it to work, but once active, you do things like get driving directions from mapquest or get the current balance from your online bank. Very Cool.