Complex sentence: To locate a mobile telephone geographically, there are two general approaches: to use some form of radiolocation from the cellular network or to use a Global Positioning System receiver built into the phone itself.
Split into simpler sentences: To locate a mobile telephone geographically, there are two general approaches. One is to use some form of radiolocation from the cellular network; the other is to use a Global Positioning System receiver built into the phone itself.