It is quite common to find GPS modules in the higher end smartphones nowadays
, and if you plan to buy a smartphone it would be wise to consider this feature.
Mobile phones by their very definition are mobile; they go with use wherever we go and make sure that everyone we know is easy to reach. However often time we don't know how to reach where we want to reach!
While GPS devices are available as standalone devices, having one integrated in your mobile means you have one less thing to carry. Much like people go for phones with better cameras so they don't need to carry one around.
GPS devices rely on satellites to precisely track the location of the device, and the device can use this positioning information for all kinds of interesting purposes. Using some kind of mapping application you can get your precise location on a map and can then use it to navigate. many applications will even give turn by turn instructions and even speak out instruction as you drive.
Using the GPS module in the device, your mobile can also geotag any photos you take with it, which will basically embed the location information into the image.
With a GPS your Mobile Phone becomes location sensitive, and this can be used by applications to their advantage, to provide a better experience