Huh? maybe GPRS..not GPS.

If you are familiar on how GPS works...it only needs to see the sky..where the satellites are orbiting our planet.
And to prove it..I have a handheld Etrex Venture which has been with me since 2001...been to South Korea, Thailand, Middle East, Germany, France, LA and NY in USA. It works everywhere..the only drawback is power. It needs AA batteries.