After a fair bit of testing I think I have figured out what is going on.
(1) GPS does keep running when the phone screen is off or when the phone is in standby, however
(2) pressing the power button appears to reset something (maybe the com port?) so any app listening to GPS looses that connection and the GPS turns off (presumably because no app is listening any more). Most apps I tried immediately try to reconnect, but by turning off the GPS has lost signal and it takes (normally) a minute or so for it to turn back on and reaquire position.
Does this happen on all Trinity devices, or is this a 'feature' unique to the Orange SPVM700? An easy way to check is to install the free ChartCross GPSTest (http://www.chartcros...002_details.asp
) and see what happens to the GPS signal when you bring the phone off standby. In my case, it shows signal very briefly, then looses it and takes a minute or so to reaquire.
Does anyone know if there's a way of turning GPS on/off independent of listening on the COM (or GPD) port?
Also, Robbied - thanks for the pointer to NonoGPSPlot. It's a great app! However, for me it doesn't keep plotting when the phone is on standby at all (even though GPS data is coming in). With just screen off it's fine, but not when the phone is in standby from the power button :-(