The first generation iPhone and iPod touch use WiFi and cell tower triangulating the location which is much less accurate than GPS such as Garmin nuvi350 and Tomtom one. But the iPhone 3G does use satelite to locate the position. Many people wonder if iPhone 3G can replace Garmin nuvi660 or nuvi350 for driving. iPhone [...]
Portable GPS such as Garmin nuvi 660 or nuvi 350 are great navigation devices but the speakers are not so great. Even you connect it to the car speaker using built in FM transmitter (Garmin nuvi 660), the sound quality is poor. It will be so much better to connect it to car stereo directly [...]