Nowadays, we interact with mobile phones via 15-20 small buttons, which makes it extremely hard to reach certain functions. To write the word "hello" needs 15 button presses on an average mobile. We also need long keystrokes to find someone in the contact list with hundreds of names. Voice dialling has been available for many years, but it isn't reliable at noisy places, and we just don't feel confortable to talk to our phones when others are listening.