CallTap service number needs your phone number as means of authentication to unsure the privacy and security of your recordings.
If your phone is setup to block your number for outgoing calls, you need to turn on the "Disable Caller ID Block" setting in CallTap. With this setting enabled, when you start a recording, the CallTap service number will have access to your number and ensure the privacy of your recording, while your number will stay hidden to the other party you would like to record.
This setting is found in the app settings.
- Open CallTap settings by tapping the ?-button on the main screen.
- Turn on the toggle labelled "Disable Caller ID Block"