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Absolutely agree. Admitting that the iPhone 4 requires a bumper would be disastrous.

I expect them to offer a thirty day money back guarantee. That admits nothing but instills lots of confidence.

I'm not sure exactly what you meant, but a 30 day return window is already the refund policy for the iPhone:

Additionally, in California, there's a legal requirement of a 30-day return window. (http://www.consumercal.org/article.php?id=224)