Japan’s four main cellular operators – NTT DoCoMo, KDDI, Softbank Mobile and eMobile ­ are together planning to invest up to $10 billion into 3.9G mobile services in the near future (3.9G performance is roughly comparable with fibre optic networks).

Japan’s four main cellular operators ?? NTT DoCoMo, KDDI, Softbank Mobile and eMobile ?? are together planning to invest up to $10 billion into 3.9G mobile services in the near future (3.9G performance is roughly comparable with fibre optic networks).

From 2010, a number of domestic carriers in Japan intend to utilise their existing 3G infrastructure to keep 3.9G rollout costs to a minimum. The Ministry of Internal Affairs and Communication is likely to issue 3.9G licences by mid-2009.