give the person the password because he is the sprite that sets the password, the give the password to the (purple) phone. When "I" call you, click the space button to "click the green button".
Please remix this and possibly add more apps and things to do. IDEA: Use variables and ask blocks to make messages (forgive me for this, but I am a bit lazy to make the messages...). I've done variable messages before, and actually, its really cool. Maybe I will add them at some point... If you want me to post my messages project, type a comment in my profile with the request :)