When I frequently make calls to automated systems that require an additional digit or extension to be dialed, I like to add these dialing key presses into my contact’s number with dialing pauses as appropriate. The Nexus One makes it easy to put pauses into a contact’s phone number.
When editing a contact’s phone number and you are ready to insert a pause, tap the *#( key at the lower left of the screen.
To insert a pause, simply tap the Pause key.
To return to the numeric keyboard, tap the lower left 123 key.
The phone number displayed on the screen will show a comma where a pause has been inserted. For longer delays you can insert more pauses.