The iPhone is equipped with an integrated GPS antenna which, when combined with the native “maps” app, can create a rudimentary GPS. GPS operates outside of the cellular signal, communicating directly with satellites to determine your position. Every other feature on the iPhone, however, relies on cellular towers or Wi-Fi networks to transmit data. This can result in the GPS using a portion of your allotted cellular data. Some third-party GPS applications save you data charges by including the maps. GPS manufacturer TomTom makes an app for the iPhone that uses built-in maps for navigation. The downside to such an app is that it tends to be more costly. Another caveat is that downloading the maps requires over 1.4GB of storage on the phone. Writer Bio
