On the ONYX2 Home page, click on the 'Settings' icon (2nd top right hand side).
In the 'ONYX Settings' section, tick 'Manually start and stop recording'.
Click on the tick icon to APPLY the setting.
On the HOME page it will now have a start recording button.
This is a icon with a red dot on the right-hand side of the display.
When you want to start recording, click on the recording icon.
When you want to stop recording, click on the stop reccording icon (black square).
If the recordings is more than 15 seconds, it will be saved.
Make a test call for more than 15 seconds and play it back to check the sound quality is correct.