By using VibrateCall, you don´t need to put your phone near your head during connecting time. Your phone keeps vibrating when it dials a call. It will stop vibrating when your call is answered.
Safer : "Radiation emission by a mobile phone when a call is connected is found to be as much as 20 times the level during a call"
Easier : You don't need to stick your phone to your ear when calling somebody, just hold the phone in your hand, you will know exactly when the call is answered.