Geolocation not working on phone

I have a page that geolocates the user and prints its coordenates. The on success of the geolocation service, it shows a list of items. It works via web on chrome, explorer, firefox and safari, but when I export the .apk to my phone, it doesn't work.

This is a screen capture of the page on any web browser:

On my android phone the coordinates are empty and the geolocation service is never invoked successfully so the list is not shown.

The permissions I've set in my app settings include:

What can be wrong?
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