Samsung Galaxy S2 Screen blinking with my App - android

I am beginner of Android Developer.I just published a app on google and I get some of feedback which is screen keep on blinking in Samsung Galaxy S2. But I tested it with Nexus4 and Samsung galaxy S3 with no such problem at all. and also tested it with simulator Android 2.3.3(API 10)also No problem with it.
Since I do not own a Galaxy S2 device, do you guys have any idea which part I should look for in order to find out the problem? because I really no idea, Please help and give advice. thanks.
the app implemented some of external library which is:
(jfeinstein10) - SlidingMenu and (chrisbanes) -Android-PullToRefresh

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