Auto answer system for Android

Android Auto answering software :: We need a Android application that install in phone for anuto voice answering with prerecorded message and take message and save in mp3 in microsd card with following features: 1. Answering mode: 1.1 Voice (record 5 custom messages) and set as per need like i am sleeping so sleeping recorded message will run. (this is only to reply) 1.1(2) PBX system if ON :: the calling party listen 1 for sales 2 for support and 3 ex so 10 extension and the setting for IVR will be generated by Recorded mp3. (browse option) after call will be connect to another number as per setting . 1.2 SMS (when this option choose the mobile automatically send save message to caller 1.3 Recording :: Auto answer and user leave there message (save in phone memory-microsd) 2. Answer if on call (on or off) if on the sms send to person Program should be light weight and run in invisible mode if user turn on (most important part) first time user install and set there settings after all things work automatically Send Bid only experience developers Thanks