Anyone have any idea why the speed would always return zero on some devices. It seems like it's AT&T devices and/or older devices. All the Verizon devices worked except one iPhone 6 we tested. We have downloaded the sample application and loaded it without modifications and it has the same problem as our implementation.
This is the sample app code: https://github.com/jamesmontemagno/GeolocatorPlugin
Thanks for any advice..