The m*free is trying to be one of those much-ballyhooed "all-in-one" devices that incorporates a digital camera, portable media player, ultra mobile PC, cellphone, star destroyer, etc. In fact, it's sort of like a Sony mylo... except (somehow) it looks worse. It works by using a cartridge system: one cartridge gives you cellphone capabilities, one gives you PMP status, etc. Clunky? You bet.
The VoIP isn't even standard, but uses a special version of the protocol that supposedly improves voice quality. Sure it does. There's a few more pics of this Sega GameGear-lookalike device within. If you dare.
It's funny, plenty of people are clamoring for the One Device that does everything for them. Smartphones are getting close in that regard, but if the alternative is carrying around that brick, you might do well to just stick to a couple of gadgets that fit your needs rather than this monstrosity, which will probably be regulated to Korea only.