Ok, further to the above. With the a-gps off, it said it couldn't get a position. but was still sucking data. I'm assuming that's the maps? I don't have them pre-loaded... is there some way I can do that?

With the a-gps on, it got an accurate lock within about 45 seconds. And sucked a huge pile of data. So that's tomorrow's data consumption gone.

Is that information helpful?