Just downloaded this app. One question. if we put someone's phone number in this App will the App vibrate or something? There is no explanation of what this App will do in the App Store. Kawal.To change your email settings (unsubscribe, digest only, or vacation mode): http://senderogroup.com/social_media/email.htm Additionally, to unsubscribe send an email to gps-talkusers-request@xxxxxxxxxxxxx with "unsubscribe" in the Subject.