OK, here's a new wrinkle. I worked out what I was doing wrong with my config--I had sipphone.com instead of proxy01.sipphone.com. However, I still haven't made a successful call yet. I dial my cell phone number and it says the call is connected and "confirmed" but then I can't hear anything and my cell phone doesn't ring, either. I checked my cell phone signal strength and it's at 2 bars--not great, but good enough to get a ring and even if it wasn't wouldn't my SVSIP call go to my voicemail? I also know that I have fifty cents of credit left on my GizmoProject account, so that can't be it either.
Any ideas?
OH and I've also noticed a bit of a lag time hanging up--in the example above, I give up after 45 seconds, or so, and hit the red phone button to hang up and nothing happens for a good 15 seconds or so. Not a huge deal, just thought I'd mention it.
Any advice would be helpful! Thanks!