
AI-generated summary
Docomo started providing RCS for Android on August 24, 2026, and since iOS 27 was released in September, it has become available for iPhone as well. RCS is used by approximately 1.26 million Docomo users as of the end of September.
On October 4, NTT Docomo announced that some users who completed the procedure at Docomo Shops and other stores were able to use RCS without being able to explain important matters regarding the use of RCS and obtain consent for third-party provision to Google Asia Pacific, the provider partner.
From September 17th to September 25th, an issue occurred where the explanation screen and consent confirmation screen that should have been displayed were not displayed for users who signed a new MNP contract at a store. The cause was a flaw in the in-store processing system. The company reportedly introduced a new system on September 17th with the aim of simplifying the MNP procedure at stores.
Approximately 16,000 cases were affected. Of these, 225 cases actually involved sending and receiving RCS messages. When sending and receiving messages, information such as the date and time of sending and receiving and the phone number of the sender and receiver was sent to Google Asia Pacific, but the text of the message is encrypted and cannot be viewed by a third party. Nevertheless, the matter was announced because of the violation of the confidentiality of communications.
RCS is a service that allows users to send and receive content such as texts, photos, and videos using a phone number, and is provided without a monthly fee. Docomo started providing RCS for Android on August 24, 2026, and since iOS 27 was released in September, it has become available for iPhone as well. RCS is used by approximately 1.26 million Docomo users as of the end of September.
Docomo is gradually suspending RCS usage for affected users starting from 8:00 PM on September 30th. In addition, we started individual contact from 10:00 on October 4th. If you wish to continue using RCS, you will need to cancel the usage refusal at My docomo, Docomo Shop, etc.
AI outlook — possibilities, not facts
Docomo will review and strengthen its in-store processing system as a measure to prevent recurrence.
Likely · Within weeks

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