Veamos, en el Service Test del menu oculto puedo probar el "Gyroscope" y funciona. Luego en Calibracion la opcion no esta disponible. Una foto se puede ver aquí:
http://forum.xda-developers.com/xper...scope-t2852805. Al final es o no un giroscopio "real"?
A G-sensor (accelerometer) can measure the change in acceleration of the device towards a direction. If you move the handset with a constant speed (no acceleration) then it shouldn't pick any signal. However, when moving their hand people change the speed slightly so an accelerometer picks that, but it will look sluggish.
A gyroscope can measure orientation, rotation and speed, so it can complement data collected from the accelerometer to smoothen out the reading of movement a great deal.
It's not the most important thing ever, but it's definitely a plus. Apps that use gyroscopes (mostly games and augmented reality apps) behave way more smoothly with it.