Some technical info on GPSone chip and GPSMode

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I believe GPSMode in the registry controls the behavior below and explains a little how it can affect assist and voice operation. I think those that comment on not getting calls are running into this and should experiment with this setting.

It's hard to know exactly which value is which though.

I'm guessing GPSMode settings are something like:

0 Standalone
1 MS Based
2 MS Assisted
4 MS Assisted/Hybrid

From http://en.wikipedia.org/wiki/GpsOne

<Snippet>

gpsOne can operate in 4 modes:

Standalone - Your handset has no connection to the network, and uses only the GPS satellite signals it can currently receive to try and establish a location.
MS Based - Your handset is connected to the network, and uses the GPS signals + a location signal from the network.
MS Assisted - Your handset is connected to the network, uses GPS signals + a location signal then relays its 'fix' to the server, which then uses the signal strength from your phone to the network towers to further plot your position. You can still maintain voice communication in this scenario, but not 'Internet/Network service' ie Web Browser, IM, streaming TV etc..
MS Assisted/Hybrid - Same as above, but network functionality remains. Normally only in areas with exceptional coverage.