Here's overview of latest J.D. Power ratings by region. Recent PC Magazine Reader Survey on cell phone providers; check out link at mid-page "Find Phone Reviews." Some free Consumer Reports info here. $4.95 gets you one month's access to full site and all their cell-related info.

DeadCellZones.com has some pretty decent information.
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"Things that have never happened before happen all the time." — Scott Sagan, The Limits of Safety