So, finally fixed the issue with motion detection on Galaxy Note 2 phones.
The shake to refresh and bouncing cube didnt work at all.
Turns out it is abug in Samsungs Firmware, the shake events were all being tagged as unreliable, so were being discarded.
I fixed it to ignore the unreliable tag, so they are now being let through and the Note 2 has its bounce back!
Version 3.2 on the Google Play store now..