I´ve been able to configure PBX with my virtual number using VoipStunt softphone, but as i´ve discovered their mobile app block incoming calls.
I´m trying to configure Blink (softphone for Windows 7) with the login details from PBX but no luck untill now.
I´ve also try to set up Zoiper on Android using the same details but Registration failed.
I can send you screenshots by PM, but i´ve followed your article http://flynumber.com/blog/how-to-use-your-flynumber-sip-account-to-make-and-receive-calls-on-a-pc/
I´m only interested in Zoiper, i tried to configure Blink to catch the problem.
i can ping the server address without problems from my PC