Mobile and Ard. Board Connection - Sound

Hello, i would really like to know how to connect mobile and Arduino board so I can push the button on my mobile app, and everything i will say to the mobile microphone, will play in Arduino board. I would like to know code, but circuit diagram too. But the best would be, if you will write an URL to some tutorial. Thank you really much!

PS: Srry for my english... It is not so good, but im from ČR! :) :) :) :)