Why in certain webhook scenarios the "client_number" is returned as "Phone Number Not Available"?

The "client_number" will appear as "Phone Number Not Available" in the following cases:

1. The user received the call on their unregistered SIM.

2. The user’s SIM could not be detected on the device.

3. The user did not provide consent to share the secondary SIM phone number.

In these cases, we do not share the actual phone number, and we pass this status accordingly in the "client_number" field and populate the "alternate_number" field with the phone number the user has registered with Truecaller.