Today I tried to calibrate the remote. I moved both joisticks many times to all 4 sides 100% but was not able to tap Calibrated (or finished).
What step am I missing?

Try calibrating the remote controller like this:

msinger Posted at 3-10 17:08
Try calibrating the remote controller like this:

https://www.youtube.com/watch?v=DK0R46QPeag

The interface for the Air that I see is completely different.
There is no blue dot to follow. It simply says to move both sticks in all directions.

Right, the DJI GO interface is a bit different. The process is the same though. You need to move both sticks around and also move the left wheel to the full left and right positions.

Hi there, thank you for reaching out and we're sorry to hear about the trouble. With regards to that Captain @msinger is correct. When calibrating the Remote when you push the start, you need to move each of the stick on each side to reach the 100% then don't forget the Dial as well then the finish will highlight and you need to tap it. Please keep us posted. Best regards!