Why is it that every time i lightly tap my iPhones power button it makes a rattle noise?

I have an iPhone 5s and i don't know why its making a noise when i gently tap the power button. (Tapping it not pressing it) I've had the screen replaced twice and Maybe that's why? But i also had a very tight case on it maybe making it loose. But i was wondering if i should take it to the carrier store and get it fixed or get a new phone (i have insurance on it). Is it normal for it to be loose?

Just go to a mac store and tell them your problem, they will be able to help you and with no cost

Take it by the Applestore. There's/was a world wide recall on the 5 for this same reason. Tell them your issue and it will under the one year courtesy Applecare. Problem solved. Best luck.

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