If you own a Galaxy S anywhere in the world or you're thinking of buying one, you're probably well-acquainted at this point with the GPS issues it's been suffering that prevent you from getting anything close to a precise lock on your location -- it might not be a deal-breaker for some, but for anyone planning on using their phone for turn-by-turn nav or fitness tracking (for instance) it's a big deal. Samsung's already committed to updating released versions of the phone in September, but what about the upcoming Epic 4G? Our testing suggests that it's functional -- Google Maps was able to give us extremely precise positions very q