Originally Posted by jswinden
They are designed with good GPS chips that have everything they need to navigate. Cellular phones don't have true GPS like the above mentioned devices. They instead rely heavily on supplemental location information derived from cellular tower locations.
You've said this before, and been corrected before.
The iPhone does
have a 'true' GPS chip, taking position from GPS satellites. It also
has cell-tower based location services for when it does not have a GPS lock. (As does my BlackBerry)