Good to know, the iPhone 4S now has [GLONASS](http://en.wikipedia.org/wiki/GLONASS) in addition to ‘assisted GPS’.
**UPDATED** (on Oct 19, 2011): [The Next Web](http://thenextweb.com/apple/2011/10/19/apple-sneaks-in-glonass-location-support-on-iphone-4s) talks a bit more about why this matters. (Hint: accuracy.)