DoCoMo and i-mode

More from Wikipedia on DoCoMo, including this on their i-mode service:

i-mode is NTT DoCoMo’s proprietary mobile internet platform and as of October 2006 boasts an astounding 47 million customers in Japan. This excludes overseas users over networks in 15 other countries, as of November 2005, through i-mode licensing agreements with cellular phone operators.

With i-mode, mobile phone users get benefits such as mobile reservations, supporting secure transactions and keeping up to date with the latest information. They're able to get easy access to thousands of Internet sites, as well as specialized services such as e-mail, online shopping, mobile banking, ticket reservations, and restaurant reviews. Mobile users can access sites from anywhere in Japan, and at unusually low rates, because their charges are based on the volume of data transmitted, not the airtime.