Step 3 : Select the Calls tab and click on the dialog box near the bottom of the page to record Enable Recording.
Now, you can record the incoming call by pressing the 4 key on the phone keypad during the call. An automatic voice will alert both parties that the call is being recorded. To stop recording, press 4 and end the normal call. After recording, Google will automatically save the conversation in the inbox, where you can listen and download them.
If you want to listen to recorded calls on your iPhone, you need to install the Google Voice application and follow the steps below.