<p>The control is <a href="https://github.com/domoritz/leaflet-locatecontrol">leaflet-locatecontrol</a> but uses <a href="https://github.com/domoritz/leaflet-locatecontrol/blob/gh-pages/src/L.Control.Locate.js#L99">map.locate</a>, which uses the <a href="https://github.com/Leaflet/Leaflet/blob/master/src/map/ext/Map.Geolocation.js#L19">pretty standard navigation.geolocation</a> api - there's not too much a js library can do right / wrong in that regard. Probably a phone-specific issue.</p>

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