Ive been using SIP on my old N95 without issue for years but having issues getting an android client to work. Im trying SIPdroid and have entered most of the settings but cant see any way to enter the external NAT server my provider issues. (It doesn't use STUN). My N95 (and windows based softphones) all have an option to "Set outbound via proxy" which in my case is nat.voiptalk.org:5065. Without that it registers but cant complete a call. So can i set this somewhere with SipDroid or failing that can anyone recommend me an android client that does work with this?