Does the Android OS and apps like Google maps actually use multiple frequencies to get a position fix? I have friends with Samsung phones supporting dual frequency gps yet the GPS accuracy doesn't seem any better than single frequency devices.
I noticed a huge difference when I switched from my older phone to my current with dual frequency, and I usually log runs, walks, and bike rides so it's easy to compare the tracks. But maybe my old phone was just bad, my Garmin watch uses single frequency and it's usually quite good anyway. I've seen a few reviews of new Garmin watches and there dual frequency seems to make a small and not always noticeable difference.