[pmontra]

Out of curiosity, do the GPS chips stop working above a given speed or it's the smartphone sw that must stop reading from them to pass import controls? And what about GPS chips manufactured outside the US, put in phones sold outside the US by non american companies (I'd say the vast majority of the market), are they still subject to that limitation?

[exar0815]

I dont really know how it works, but its possible to circumvent, atleast some non-profit guys managed it: http://copenhagensuborbitals.com/gps-without-limits/