Yes, I suspected that is what you meant.

Nevertheless there are physical limitations to antennae design. A good antenna takes space and affects aesthetics and design of the end product. There are just no space for a real GPS antenna in cellphones and watches etc.

Satellites are very far away. They use limited power sources such as solar panels and small nuclear power plants. The signal reaching the earth is very weak. Better GPS chipset is not only better sensitivity but also employing DSP technology to separate signal from noise or multi-path issues.

Since cellphone BST tower always has a GPS to serve as a time base, A-GPS works fine. But these devices lacking a true GPS doesn't work in area of no service, such as in foreign countries. My BB8830 is one of these.

I have a Garmin GPS 10 BT pug. It supports cellphone OS such as Palm, Symbian so my Treo and Nokia N72 can load up a mapset on flash cards and work as GPS. But the functionality tends to be quirky thus limiting their usefulness as a real tool. Plus I will need to carry another charger in the travel kit.