We noticed that some Samsung devices experience jittery streaming. Sometimes frames are displayed out of order. It's noticeable especially during head movement because you may skip back to previous rotation and jump to the correct one on the next frame. Overall, it feels like framerate dropping to low FPS when you move your head around.
We're currently trying to solve this problem but it's very random and every bit of data is useful. If you experience this problem, please send diagnostic data with a note "jittery streaming". This problem happens both in Gear VR version and regular one.
See this article to find out how to send diagnostic data using VRidge beta app.