First of all I just want to say what a superb app this is - by far the best SIP client on the iPhone, thank you
Generally it works perfectly but I have one rather major issue. If the app is open and I receive an incoming call to my sipgate account everything works as expected. However if I use push to notify me of the incoming call, once the app has loaded the caller is not able to hear me. Then after roughly 10 to 15 seconds the caller is able to hear me but I then can't hear them. After a further 10 or 15 seconds we can both hear each other. This is when my iPhone is logged onto my home Wi-Fi connection.
I've just tried the same thing but using a 3G connection rather than Wi-Fi and everything worked as it should and the caller could hear me straight away. This got me thinking that it could be a problem with my ADSL Wi-Fi router but I've put my iPhone in the DMZ and no luck. Also if that was the case why would the app work fine on Wi-Fi when not using push.
Any ideas?