two ideas for improving the phone experience, will add to brainstorm.

1. custom-sized speed dial shortcuts on the desktop. pressing the icon would trigger a pre-defined action, in this case calling a specific number. handy for those cases when you're outside, on the move, maybe with gloves on your hand and only one hand available.

2. when in phone app, shaking should trigger specific actions. what about shaking triggering a suggestion to call one member from a pre-defined group? shake again and the next person is suggested. when you find the person to call, put the phone to your ear and the light sensor will trigger the call function.