Android/Iphone Autoanswer and File Play

Need an application which can let an android, Iphone work in following mode: -Autoanswer mode: When a call comes in, autoanswer the call after X seconds, and play a given voice file to the caller and then the conversation starts. -Normal mode:All incoming calls are treated normally. The value of X seconds, and the audio file path can be set from preferences. This a very small application so no high amount bids please. I need a demo first before awarding the project. You could use any hardcoded sound file name to play or mention demo version or whatever you like. we prefer demo on android Thanks