Still on track to launch its LTE network this year, Japanese carrier NTT DoCoMo has today announced that its first prototype handset designed specifically to handle all that bandwidth will be unveiled at MWC 2010. We already knew a cool $10.4 billion or thereabouts were to be spent on Japanese LTE deployment, and now we can break that figure down a little by noting that NTT will be spending between $3.3b and $4.4b on its infrastructure alone. All we know of the new phone so far is that it'll be the product of the overall partnership with NEC, Fujitsu and Panasonic, but judging from NTT DoCoMo's last prototype to grace these pages, we're unlikely to be left wanting.