I have been playing with the AT&T Samsung Eternity for a few days now and I can't get the GPS to work in it. I can get tower-triangulation to work. And I had to keep re-downloading Google Maps to get rid of the stupid (Allow, Always Ask) nag window. It's still nice to have tower-triangulation, but it keeps finding me on the other side of i-24; so it is up to several miles off of my correct location. On the forum for the Eternity, people have claimed if you keep re-downloading Google Maps that it will trick the phone into using GPS, but I don't have the patients for that right now. It took me a bunch of downloads just to change the (Allow, Always Ask) nag window to (Allow, Ask Once); so I don't want to try that right now.
So the Eternity as it is now can't use GPS.