Android, Nokia and iPhone in the UK, as seen in Google Trends. Local charts are more informative for this sort of thing. The long, slow, steady collapse of Nokia is very clear, as is the distance that Android remains behind Apple. It’s also pretty easy to spot new Apple product releases on these charts - and clear that Nokia’s relaunch has not had a comparable impact on public consciousness, at least not yet.
I am slightly suspicious of the drop in Nokia search volume at the beginning of 2011, though - looks like an artefact in the Google system rather than a real-world change.