Mine can get fixes indoors, but it depends on the particular indoors...doesn't always work. I've had other phones and Garmin-type units that have been unable to get GPS fixes indoors, or even outdoors in downtown San Francisco in between a bunch of skyscrapers...that's just how it is.
I've had mine tell me I was in the Atlantic off the coast of NC. I was driving in Ohio.... It's a little flakey some days, but most of the time it's pretty good. Inside you're going to get mixed results. Some buildings are more radio transparent than others.