As mentioned earlier maps form an integral part of a GPS system.There are numerous map providers like MapmyIndia, Wayfinder and Satnav in the market today. Garmin -- a satellite navigation equipment provider -- is also expected to enter the Indian market this year. Apart from that handset manufacturers like Nokia also provide their own maps on their GPS enabled devices. Most maps are either Off-Board or On-Board. On-Board maps are physically located on the phone and can be accessed through a mobile network to pinpoint the desired location. On the other hand Off-Board maps are located in the network server and are downloaded the moment GPS is activated. They take a lot of time to become fully functional, and may cost you extra for data access and network usage.Apart from maps one also needs to buy navigation licence to enable naivgation through the phones. One also needs to consider that along with the license, how many updations is the map provider offering in a year. One also needs to know the features provided in the navigation application like turn-by-trun navigation, voice guided navigation, padestrian navigation, etc.Another simple way of using GPS is through Google Maps. In this case directions can also be obtained but no voice guided turn-by-turn navigation is available. However, in case your phone doesn't have GPS, you can access Google Maps through GPRS, but without any other GPS features