Wow. The best SIP client for OSX. And a very helpful support!

Ive checked most SIP clients for OSX. Free or not. They all have some problems, missing features, etc. But not this one. Blink pro is a great SIP client. Takes all the others hands down.
I had a small issue with caller ID on incoming calls. The developer responded to my ticket very fast and sent me a fix.
I was very impressed with the app and the support.

InonP about Blink Pro