This is roughly what is there already. You have three modes:

"Cell tower": Takes any position it gets... doesn't even try to turn the GPS ON

"Cell+GPS". Turns the GPS, and tries for a while (30 seconds for now, and not configurable, for now - this might change, but I don't want to clutter the UI with useless minuteae) and if no GPS fix comes in, settles for the cell tower fix... if a GPS fix DOES come in, take that.

"GPS Only". As per above, but if 30 seconds pass with no GPS fix, it simply doesn't do anything and ignores it, never actually uses a cell location AT ALL.

Interesting. I'll think about it. In a sense, I have all those parameters already, tho the timeout and the accuracy limit are not configurable at this point.

/Z