Area

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Learn more about 5G

I am having trouble getting signal

Learn more about our efforts for au network

Event measures

KDDI is taking measures to strengthen signals so that customers can use mobile phone services comfortably at festivals, fireworks displays, and other events. (in Japanese only)

99.9％

Connection initiative

au users enjoy a service area with 99.9％*1coverage with 4G LTE. (in Japanese only)

  1. The coverage percentage is calculated based on areas within the approximately 500m grid areas used in the national census with a communication availability of 50% or higher.
    Information listed is as of the end of December 2020. This information is subject to change.
    Applies to 4G LTE (800MHz)-compatible devices.
    Does not apply to iPhone 5 or iPads (2012 model).

Notice

[Important] Announcement regarding the discontinuation of service for devices that do not support "au VoLTE"

As of the end of March 2022, devices that do not support the au high sound quality voice call service "au VoLTE" can no longer be used. Customers using devices that do not support "au VoLTE" may continue to use their devices until the discontinuation. However, after the service discontinuation of these devices, a switch to devices that support "au VoLTE" will need to be made to continue using au services.

Disaster response

  • By phoneOpen 9:00 – 20:00

    • English

      0120-959-472(Toll Free)

    • Portuguese

      0120-959-473(Toll Free)

    • Chinese

      0120-959-476(Toll Free)

    • Korean

      0120-959-478(Toll Free)

    • Tagalog

      0120-933-952(Toll Free)

    • Vietnamese

      0120-933-961(Toll Free)

    • Japanese
      about au mobile services

      157(Toll Free)from au phones

      0077-7-111(Toll Free)

      about Internet services
      Contract / Fee / Billing

      0077-7084(Toll Free)

      Connection setting / failure

      0077-777(Toll Free)

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