This would be great. During hiking I had my phone tracking the location anyway because of the much better GPS reception. Using that to cheaply (in terms of battery) providing a position to the bangle is a good thought.
@user148386 having a new method would mean all apps would have to be changed to use this. Overriding the original method (possibly as a config option) solves this. This can also allow an automatic fallback to internal GPS should the watch get disconnected from the phone.
Not sure I would want an automatic fallback to watch gps. Too dangerous in my view as you might not be aware and it could flaten the battery. Also there could be a long period of no fix whilst the gps powers on and gets a first fix. Would have to be an option IMO.
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