Portable navigation devices (PNDs)All smartphones come with GPS and A-GPS capability and with better network support, online updates to their maps, and multiple applications to take advantage of GPS and maps. Smartphones outshine PNDs as navigation devices. The only drawback with most maps services is that they can't be used without network connectivity. However, even this can be overcome if you decide to buy a map from an app market instead of relying on the default free application.
A typical PND costs Rs 5,500 onward while the maps app will cost you at least Rs 1,300.