Help Calibrating compass?

[Michael Hayworth]

In the middle of a cross-country motorcycle trip, I went to load Google Maps for my next destination. The app, which had been working perfectly, suddenly told me I needed to install Google Play Services, which it said wasn't on my phone. I let it download and install, and then it asked me to calibrate the compass by moving the phone in various directions.

I was in a hurry and kinda half-assed it, and since then, the phone has been a bit off on its vertical/horizontal orientation. I've

 

[funkylogik]

This app https://play.google.com/store/apps/details?id=com.gn.android.compass shows you how to calibrate the compass when you first open it.
Hope it helps