If you want to enable the call recording feature on your virtual number then you need to follow these steps:
1. Login to your VPL (Virtual Phone Line) account.
2. On the next page you can switch the on/off call recording feature on your virtual number.
3. On the above image call recording feature is off. When the image button change into to "On" that's mean call recording is on, and when it's off that's mean call recording is "Off".
FYI: You can have 30 mins quota on monthly basis.
How to check and download recorded calls