Is it really necessary to make such a fuss when you receive a mobile call? Citizen has a watch that takes the fuss out of it. The watch displays your caller and even lets you reject and divert calls.
C-Scout is importing the watch from Japan for $379. They describe, "Designed to be functional when discretion is a must or is fashionable, the i:VIRT is a Bluetooth watch that pairs with your mobile phone to notify you of incoming communications. When in a meeting or other inconvenient times, you can be discreetly notified on your watch and avoid making a scene by pulling out your phone."