maybe I put it wrong... it's the old "bug" with these kind of apps...

here is how it manifests:

1. number ABC blacklisted
2. call from number ABC
3. caller ABC have busy tone immediately (that's perfect, of course)
4. my phone rings, and I can see the notification of a incoming call from ABC on my screen - it lasts just for an instance... one time it' just for few tenths of a second, next time it's for second and a half, and then Your app blocks it - ringing sound goes off, screen goes black, and call is regularly noted in the Firewall+ Pro log, with no notification at all on any of my screens, as it should be... it's just that for some short period it does ring like the number ABC is not on the black list...

I repeat it's the old problem... ok, caller getting waiting tone for a few moments was the old problem too, and You solved it very efficiently, hope that You'll be able to sort this one too - keep up the good work - it's pleasure to pay for the software so useful and good...