Custom Caller ID shows your real phone number to a contact when you make a call using the Cloud Calls feature.
To enable Custom Caller ID:
Log into your Reply account.
On the Tools tab of the Settings page, expand the Call Features section.
Enable the Custom Caller ID toggle.
In the Phone number field, enter phone number you want to show your contacts and click Add phone. You will receive the incoming call to confirm your phone number.
Enter the verification code from the popup in your phone.
You phone number is now connected to show it to your contacts.