Have you modified the sample in any way? Is anything showing up at all? If not please check the reported device's location (AR.context.onLocationChanged) and the POI locations (AR.GeoLocation), it might just be that you are too far away from the POIs.
Is anything else showing up on the screen or in the log output?
almost 8 years ago
I am testing the example shows a label on a point of interest, but no label is not displayed.