The yellow indicates there is an issue with the phone accuracy (typically). This can usually be fixed by getting a better GPS lock (accuracy below 100 feet).
Remove the Yellow status on the GPS indicator on the Camera
Only have a Red and Green indicator to show that I am either at the location (Green) or not (Red). (Entered for user Gino)
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Please see the related FAQ about how the GPS indicator in the camera works: http://pruvan.zendesk.com/entries/41634598