It's never had an issue either.
I got two iPhone 5s for my daughters. One of my daughters like to bake, read and act—let’s just say she’s not physically demanding on her phone. Her phone broke twice within the first couple of months—main screen—from minor drops.
My other daughter is a skater who’s hair color changes more often than the weather. She is on the run constantly, bruised and scraped up. Her phone looks like a prop from one of those post-apocolyptic series, but it has never broken. Go figure—sasme phone, same day. Random chance...