Today's smartphones have a very interesting feature which is not often used: speech recognition.
In You Don't Need a CRM's mobile app, this feature will enable you to make a fast debrief of a meeting without having to type any text; you can just dictate it to the phone.
To do it, click on the comment field of a lead. On the keyboard, and depending on your model of phone or operating system, the icon of a microphone should appear (usually) on the left side of the space bar. Press it during the entire time you speak, with a clear voice and slow pace. The speech recognition mechanism will transform the voice message into a written message. You will only need to correct a few mistakes and then click on "send".