Docomo, Japan's largest mobile phone operator, takes a tentative step toward that future this month with the trial launch of a phone equipped with Sony Corp.'s FeliCa smart chip, which can store electronic money and personal information.

DoCoMo said it will supply test phones to 27 service providers, including videogame maker Sega Corp. and All Nippon Airways.

One service being tested by financial services firm Kokunai Shinpan Co. Ltd. and real estate company Hayakawa Fudosan allows residents of a new apartment complex to use the FeliCa-equipped phones as keys to both the main entrance and their homes. The phone can also pay utility bills when swiped against a reader at the building's entrance
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