But you'll notice that everyone who doesn't have the problem always thinks backing it up with "and my brother, and so and so and so and so" also don't have it." makes their argument stronger. Actually weakens it. It's likely a combination of causes. Come back and say your phone doesn't have it when you take it to your cousins and can reproduce it on his phone and then afterwards can't on yours. I've seen posts asking for video of one phone broken (thereby satisfying the location requirement) and one phone not showing the symptom. I haven't been following to closely but have yet to see one. So far all the posts I have read, it's all phones have it for someone, or all phones don't, never a mix. That tells me that all phones are likely to have the same reactions to the same environments, good and bad.