A phone application includes a note button. During a call, when the note button is pressed, a note entry screen is presented to a user. The note entry screen is pre-populated with information already known about the phone call (number of caller, number dialed, name of caller, name of person called, etc.). The know information is retrieved from network data, including phone number and caller id for incoming calls, and the number dialed for outgoing calls, each in conjunction with the user's address book. The user completes the note entry screen including any notes the user wishes to make regarding the phone call. Upon completion of the note, if an address book entry has not been made or is incomplete, an address book entry screen is presented to the user to make or complete an entry for the caller/person called. The phone application runs on a PDA having telephone capabilities.