After using my D INC which seemed to lock on to position almost immediately, my Thunderbolt is turning out to be a slug!! At least in the beginning, it would be slow to lock on, but now after a few weeks it's actually getting worse (NYC and suburbs). I can't seem to get anymore accurate than 500 feet and it is almost always a few blocks off in the city. I've tried turning on and off the various GPS options (VZW location or not etc..) I don't enable wifi so my battery doesn't croak in 10 seconds. I know this has been discussed, but has anyone (especially in a major metro area) figured out how to get GPS working well. I actually use google nave a fair amount, Thanks