Cardboard on Android - don't move

I'm doing some test with Cardboard. I tried the Cardboard example in iOS and works fine. I also created my project with my models and all works.
Now i'm trying in Android and it seems that the VR cam doesn't move! When i start the example on my Android device it moves just a little on the "up direction" and later it stop and i can't move in other directions. And anyway... when it moves up, it's super slow... but anyway the rest of the app run fine (for example the particle system is not slow).
I'm using Unity 5.1, published from Mac on this phone:

http://www.gsmarena.com/vodafone_smart_prime_6-7230.php

with Android 5.02.

When i press on "setting icon" i received this message "Get the Cardboard app in order to configure your viewer"... and i don't receive this message on iOS.
I downloaded Cardboard app and also the demo have the same problem.
Do you have any idea how to solve that? I don't think that my smartphone has not enough power.

 

Sorry for this post... i realized that the problem is that my smartphone doesn't have the gyroscope! :-|