Can I trade in my iPhone 5? for compass inaccuracies

My iPhone 5 is not accurately displaying good cordinations on the compass app or the map apps (iPhone and Google maps). It keeps showing 15 - 25 degrees off. I have calibrated the compasses on all apps and checked my location settings under privacy settings to make sure they are all on. I have not found a solution to this problem after trying to calibrate in multiple locations without magnetic interference. Can I take this phone back to the store for further assessment or change?