What happens when you turn your smartphone into the figure 8? The reason is.

Suddenly, have you seen a person turning a smartphone around a figure 8? Like returning your wrist, turn it smoothly. It is not playfully funny, but this behavior has a proper meaning. This is one way to deal with when the electronic compass (geomagnetic sensor) does not show the correct direction when using the GPS (location information) function on the map application.

(https://newspicks.com/news/2440653?ref=user_1419961)