Loved my phone in Chicago.
Was on the phone while navigating at the same time. Then listened to internet radio while navigating.
On foot, maps allowed me to navigate the best bus routes, told me which bus was coming next. I was then able to triangulate my position so I could see where my stop was.
Used maps to find the closest pizza joint. While waiting for my deep dish pizza, I was able to edit and post all my chicago photos. Which included panoramic photos
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Tethered priceline to score $77/night at the downtown for star Hyatt and found an external parking lot for $26/night.
Or I coulda not had a smart phone. Or one not as nice.