Windows Phone 8 does not currently support recording of telephone conversations. If you would like to see this support added, you can go to the Windows Phone Feature Suggestions website and make requests for future releases.
You can record a note with your voice using Microsoft OneNote Mobile:
- From Start, swipe left to the app list, tap OneNote > New.
- In a note, tap Audio.
- Tap Stop when you are done.
- To play the audio, tap Audio note.