iPhone 5s always ask to calibrate compass
I have recently purchased a new iPhone 5s 32GB having iOS 8.2 installed on it. Everything is working fine and perfectly except the compass app. Each time I open the app it shows a circle with a red ball inside it asking to calibrate the compass showing a message: "Tilt the screen to roll the ball around the circle".
After calibrating, the app works fine but as I remove the app from background and open it back again, it again shows the same circle with a red ball and the same message asking to calibrate again.
Anyone with a solution kindly help me. Thanks
iPhone 5s, iOS 8.2