While in a phone call conversation, you can tap on the "Note" button



Then select "Menu", Then select "View Recording bar"



The recording bar appears at the bottom of the screen, simply
Tap the record button. When finished with the conversation, you
can simply tap the stop button and it records your conversation.



This will then have a speaker appear right under the Notes: entry.



This is not the best recording, but it does get the job done.