How does GPS work

When you turn on your GPS unit or GPS enabled mobile phone for the first time, it starts to search for satellites, usually it needs at least three satellites to determine your current location, however it needs signal from four…

GPS versus A-GPS

Many mobile phones have GPS or A-GPS receivers but numerous users are not sure what A-GPS is and what the differences are between A-GPS and GPS. A-GPS is short for assisted global positioning system. Generally speaking, when you switch your…