Originally Posted by
gfunkdave
It's probably not explicitly allowed but won't harm anything either. It probably won't work, in any case. The GPS chip in most phones needs a cell signal to give it its initial rough location before it can fine tune things.
I guess it just pings a cell but does not send any data? I travel abroad with roaming data and cell turned off, but gps (google maps) works fine. It won't render the map (unless I've preloaded it) but will pinpoint where I am with geo-coordinates.