I can't say for sure if it's anything to worry about or not. I do know mine gets a little warm after using it, but I'm on it sometimes for three hours at a time. I do have a Silicone TPU Case on it, so feels warm through the case. I've never had any problems with my Note acting up or not doing what it's suppose to, so doesn't seem like a problem for me. Interested to see if others have it get warm or heat up.
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