I have had AT&T Call Protect on my iPhone 7 for about a year now, but when I open the app, it states that I need to verify my device. However, no matter how many times I request a PIN, I never receive one via text. I have already followed the procedures I have found elsewhere in the forum, but to no avail. That is, I have removed the app from the phone, and then removed the feature from my account online. When I reinstall the app, the cycle begins again. I have been searching to see which phone number might be sending the PIN message because I am wondering if I have it blocked, but I have found nothing. Otherwise, I can't explain why this is happening. The iPhone is up to date with all iOS patches (12.4.1). Please advise. Thanks.