This simple app will enable bluetooth on your phone when you receive or make a call so you can answer it on your bluetooth headset or bluetooth hands-free device.
This way you will preserve the battery life of your phone.
Note that it will not answer your calls automatically (this can be accomplished by enabling the auto-answer setting under the call settings of your phone).
You should have your phone and your bluetooth device already paired.
Your bluetooth headset or hands-free device must support bluetooth headset profile (is most probably it will)
1. Open application.
2. Select default bluetooth device from the device selection list.
3. Select Active to activate it