b-mobile Helpdesk for VISITOR SIM (For inquiry about VISITOR SIM only)
Business hours 13:00 - 16:00 (English)
03-6721-5032 (calling from domestic network)
81-3-6721-5032 (calling from overseas network)
Business hours 11:00 - 17:30 (Japanese only)
03-5776-1700 (calling from domestic network)
Inquiry Form We will reply within 3 business days.
However, we may not be able to send you a quick response, or even any response in some cases.
We can not answer any inquiries which is written other than English.