Speaking of calls, your options when receiving one are to to pick up, hang up, or reject with a text message -- with a slide-up menu offering you the most common apologetic missives to send out.

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Finally a new mood message box at the top of the Skype app menu makes it easier than ever for users to share how they are feeling, what they've seen, or what they're up to.

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Insoo doesn't even have to take the phone out of his pocket to send an SMS. He knows how to slide it open, which buttons to push how many times to reach the "Send SMS" menu option, compose the entire text message, and hit the send button -- all without even looking at the phone.

CNN: A day in the (digital) life of a South Korean boy