Hi, i just traveled from portugal to norway (3400 km apart). When i was in my country the spark never had a problem but since i,ve turn it on in norway, he drifts a little, lost gps signal once and went to OPTI mode in my last flight (i manage to land it).

Do i need to calibrate it? He doesn't ask but the flight behavior is so different here that im afraid to lose it.

You need to callibrate the compass

Do not have metal objects, mobile phones etc in your pocket, and callibrate in wide open space

Thanks everyone

It sure  looks like it.
When you have footage, I would love to see it.

I would recommend you to change another open place with good GPS signal and calibrate the compass to confirm.

Best to calibrate each time you are in a new location.