Symbian, you are liar

I had read are Symbian FAQ that Symbian OS didn't designed to support Full-Duplex !!!!!!!!

But I found that Nokia had release an example that demonstrate how could u implement full-duplex application and for 3^rd generation mobile there are APS (Audio Proxy Server)

But

You must sign your application, not only the normal one but also more advanced one to enable you to access APS API which require Money + Time…. And it might not be approved.