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Apparently Touch ID doesn't like 180-degree unlock attempts

I'm not going to pretend like I discovered this bug after weeks of rigorous testing -- in fact, had I slid my iPhone 5s into my pocket in a different manner, I'd never even have known this existed -- but here we are. Despite Apple touting the Touch ID sensor as being able to read prints in any orientation without issue, my phone practically refuses to accept unlock attempts at 180 degrees. But rather than just refusing to unlock, it produces the signature Apple logo and black background that signifies a reboot before returning to the lock screen after about 10 seconds.

At first, I thought it was just my device, and given that the other iPhone 5s users here at TUAW have been unable to duplicate the glitch, I was satisfied to leave it at that. But then I stumbled across a YouTube video from another user experiencing the exact same bug as me.

This is undoubtedly the strangest little glitch I've discovered since snagging my iPhone 5s on launch day, and since I don't make a habit of unlocking my phone upside-down, it's not exactly worth a trip to the Genius Bar. Still, the bug is present regardless of which of my programmed fingers I use, and it only occurs when trying to unlock the device from a 180-degree angle. I'd love to hear if any of you iPhone 5s owners out there are able to duplicate this, so feel free to chime in down below!

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