Portable navigation devices (PNDs) are handheld products that receive GPS signals to determine location. Connected PNDs embed a WAN digital cellular or Wi-Fi connection to connect to services designed to enhance the navigation experience, including traffic information, local search and other location-based services. PNDs with a WAN digital cellular connection can also use assisted GPS (A-GPS), which enables a faster time to a location fix. PNDs are used in cars to provide turn-by-turn directions and location-based services. PNDs typically have 3.5- to 5.2-inch screens and include maps of a given region stored on internal NAND flash memory.