I'm a newbie at the n900, lots to learn, and I've been combing the forums for a couple of days now and I'm stumped. The problem: I have voip (sip) over wifi enabled on the phone, and also have a T-mobile cell account for when I'm out of the house.

I want it to use wifi-voip FIRST, and only fall back on T-mob if it has to.

But it does it the other way around! Cellular seems to be the default, and I have to select the sip line every time. How can I put sip first?