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Services

Repair and Delivery

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【Location Search Support】I would like to know how to find my mobile phone if I lose it
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I have subscribed to Repair and Delivery Support so what should I do if my au mobile phone malfunctions?
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What are Repair and Delivery Support, Repair and Delivery Support with Cloud and the Repair and Delivery Support Wide with Cloud?
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I would like to replace the battery of my Android tablet
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I would like to know the phone number of the Repair and Delivery Support Center
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【au Hikari】I would like to know how to troubleshoot wireless LAN connection issues
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Confirm and Change Contract Information

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After I have changed my plan, when will the new plan take effect?
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Can I change my usage plan in the middle of the month?
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If I cancel my contract in the middle of the month, will the monthly fee be prorated?
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Can I change my plan without upgrading the device?
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I would like to change/review my plan
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I would like to know the destinations that are not eligible for free calls under the unlimited calling plan
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I would like to change the name of the contract holder for my au mobile phone to a family member’s name
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I would like to know the procedures required when my name changes (due to marriage or name change)
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I would like to change the name of a mobile phone /tablet due to the passing of the contract holder (inheritance)
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I would like to know how to change from a 4G LTE contract to a 5G contract
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Can I upgrade my device even if I have remaining installment payment balance?
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I would like to change the contract holder name of my mobile phone from parent to child
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【au Hikari】I would like to check my contract information such as basic contract number, renewal period, and contract date
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I would like to change my contract/billing address
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Can I use an au/UQ mobile SIM card in a SIM-free or used smartphone?
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I would like to check my contract information
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I would like to know how to change my au mobile phone number
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Can I choose the phone number I want for my mobile phone?
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【au Smart Value】I would like to check the subscription/application status
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International Usage

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Interested in international calls?
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【au World Service】I want to know how to make a phone call from Japan to an au mobile phone outside Japan.
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My au

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【My au】Can I switch the display of the My au app to English?
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【My au app】I would like to know how to make inquiries via chat
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【au Smart Value】I would like to apply for the service
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【My App】I would like to check the history of my procedures
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au PAY

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【au PAY】Please tell me the method of payment at stores
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【au PAY】I cannot log in to the au PAY app
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【au PAY】I would like to check my balance
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【au PAY】I would like to transfer my balance
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【au PAY】Where can I check my usage history?
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【au PAY】I would like to know the causes of errors displayed during the charging process
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【au PAY】I would like to charge using au Easy Payment
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【au PAY】I would like to charge using a credit card
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【au PAY】I would like to know how to charge using cash
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【au PAY】I would like to charge from a bank account other than au Jibun Bank
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【au PAY】I would like to deposit my balance into my au Jibun Bank account
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【au PAY】Can I still use my au PAY balance after cancelling my au contract?
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【au PAY】Can I use it without having a contract for an au line?
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【au PAY】I would like to know when Ponta points are added if I pay with au PAY
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【au PAY/au PAY Prepaid Card】What is au PAY balance?
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au Prepaid card and au PAY card

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【au PAY Prepaid card】What is the difference with au PAY?
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【au PAY Prepaid Card】I want to start using the card
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I would like to add my au PAY prepaid card to Apple Pay
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【au PAY prepaid card】I would like to renew my card that is about to expire
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【au PAY Prepaid Card】I would like to suspend the usage temporarily
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【au PAY Prepaid Card】I would like to cancel it
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【au PAY Prepaid Card】Can I use it to pay for public utility bills or mobile phone usage charges?
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【au PAY Prepaid card】Can I use au PAY Prepaid card for payments on highways or at gas stations?
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【au PAY Prepaid Card】I would like to check/reset/change my card PIN (Forgot my PIN) *For customers who have a card issued after April 23, 2024 (IC chip card)
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au Easy Payment

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【au PAY (au Easy Payment)】I would like to know the causes of errors codes displayed
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【au Easy Payment】How to set or remove usage restriction
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【au Easy Payment】I would like to check the services I am continuously paying for
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Ponta Pass and Ponta Pass Light

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【Ponta Pass/Ponta Pass Light】What is the difference between Ponta Pass and Ponta Pass Light?
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【Ponta Pass/Ponta Pass Light】I would like to know how to check my subscription status
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【Ponta Pass/Ponta Pass Light】I would like to know how to apply for the service fee support
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Amount of Data

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I would like to know the approximate usage for 1GB of data transmission
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【Data Charge】I would like to know how to purchase
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What is a Data Charge Card?
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How to use the Data Charge Card
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【Data charge】Is there an expiration date for the data I purchased?
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Frequently Asked Questions about data transmission speed reduction
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When does data transmission speed reduction occur?
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I would like to check my data usage
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I would like to know the breakdown of this Month's Data Capacity
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Email and SMS

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I would like to change my email domain to "au.com"
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I would like to know how to deal with suspicious emails and text messages (SMS) from KDDI, au, etc.
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【au Email app】I would like to know how to deal when I get a "Reception Failure" [受信失敗] notification or when reception is delayed and I cannot receive in real-time
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【au Email App】Does it automatically delete old emails?
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【au Email Portability】I would like to set up a spam filter
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【au Email Portability】I would like to reconfigure my email app
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【au Email Portability】I would like to cancel this service
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【au Email Portability】Can I continue to use my au Email Portability email address after re-contracting with au?
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【au Email Portability】How to apply for the service and set up the Email App (Android)
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【au Email Portability】How to apply for the service and set up the email app (iPhone / iPad)
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【au Email Portability】How to apply for the service and set up the Email App (Gmail)
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【Android】I would like to know how to report spam emails received in my au email address
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Ponta point

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I would like to check my Ponta Points
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【Ponta Point】I would like to send points to my family
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【Ponta Point】I would like to know how to use my accumulated points
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I would like to check my Ponta points accumulation history/usage
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Can I use Ponta points to pay my au monthly charges?
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Device Operation

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【Android/4G LTE Mobile Phone】I would like to know what to do if I forgot the lock number
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【Anshin Filter for au】I would like to know how to individually allow app restrictions
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【Anshin Navi】Do I need to download the app as the searcher, or the person being searched?
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【Dejira App】I would like to get the latest version of the app
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I would like to remove a device that allows log in with au ID
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SIM Unlocking and IMEI Information

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I would like to know if the SIM-locked at the time of purchase
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Can I unlock the SIM lock on my mobile phone?
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I would like to know how to unlock a SIM
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I would like to check if my device SIM is unlocked
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What is IMEI?
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Billing Amount Confirmation

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"Calls Details Statement" What is it and how to apply
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I would like to check my Calls Details Statement online
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Others

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I would like to know what phone number KDDI uses when contacting the customers
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What are phone numbers starting with "0800"?
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I would like to reissue an eSIM that I accidentally deleted
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Looking for SIM Card only?
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  • All of the indicated amounts exclude tax unless otherwise specified.
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