Originally Posted By: Treeseeker
However, I have read that most smart phones don't maintain local copies of the maps, so you still need to be in cellphone range to use GPS mapping.
Google Maps recently added an option to store selected maps on the phone. Actually they've had it for a while, but it was a "Lab" beta feature. Now it is part of the core product.

It's in version 6.9.0. Press Menu, then "Make available offline".
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