I bought an MHL to HDMI cable (http://www.amazon.com/gp/product/B0...ag=hawk-future-20&ascsubtag=UUacUvbUpU3579742), but it doesn't seem to work. Is there anything special you have to do or should plugging it in just work? I did plug the USB into a power adapter (not just a USB port) and I don't even get a charging indicator. I'm guessing I have a bad cable, but I've never used one before so I wasn't sure.