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Covered areas & propertiesWe are sorry, but if the contract holder is a minor, they cannot sign a contract online and must contact us by phone. Thank you for your understanding.
Notes for those who wish to use MNP
Please obtain the MNP reservation number at Step 2 "Contact/procedure from J:COM".
Please select whether or not you want multiple lines, and the day of the week and time you would like to be contacted.
Depending on the congestion situation, it may take a few days to get back to you.
Inquiry form Contact us by phone (toll free)AM 9:00~PM 6:00 [Open all year round]
J:COM will call you to confirm. After that, please follow the instructions using the dedicated form.
We may ask you to send us a paper copy.
For MNP (transfer from other companies) customers, please obtain an MNP reservation number at this time.
After confirming the contents by phone, please follow the procedure from the dedicated form described in the email you receive.
In the case of paper procedures, please enclose the necessary documents and return them.
After inspection *1, the package will be delivered to the address in your contract.
For customers who did not complete the contract online, J:COM will contact you by phone.
You can check the remaining data amount for the current month and purchase additional data.
Learn more
As a perk, you can use the highly secure public wireless LAN service (Wi-Fi) free of charge.
Learn moreIf a youth under the age of 18 uses J:COM MOBILE, it is necessary to set up a filtering service.
J:COM will provide "Anshin Filter for J:COM" free of charge to eligible users.
It is mandatory by law for young people to subscribe to a filtering service. On April 1, 2009 (Wednesday), the ``Act on Creating an Environment for Youth to Use the Internet Safely and Securely'' went into effect.
In principle, J:COM MOBILE charges can only be paid by credit card. Acceptable credit cards are those with the following marks.
Debit cards are not accepted.
It can be used to pay for products (terminals, etc.) and monthly usage charges. Matters related to the date of withdrawal from the credit card settlement account and payment are based on the membership agreement stipulated by the designated credit card company and the terms and conditions and special agreements stipulated by the Company. In principle, please specify a credit card in the name of the contractor.
We introduce frequently asked questions from customers.
If you have any questions, please contact us by phone or chat.
You can apply easily from the website. Free support is also available upon request.
You can apply for J:COM MOBILE online. You can complete the process from the comfort of your own home, so there is no need to go to a store and wait for a long time.
Once you receive your smartphone, you can receive free support if you wish. We will provide detailed instructions on how to use your smartphone, as well as the initial settings.
Those applying for "J:COM MOBILE D Plan SIM Card" are not eligible.
A maximum of 5 lines can be subscribed to under one contract name.
The contract name will be the same.
Only eSIM (A plan SU) can be contracted under a separate name. However, you may not be able to receive benefits such as Date Mori.
For example, if you have a contract with J:COM in your husband's name.
In this case, both the wife and children are contracted in the name of the master.
You cannot pay separately.
Only one type of payment information is required to be registered at the time of contract.
J:COM MOBILE can now be applied for nationwide from September 17, 2020.
You can also use this service even if you live outside of J:COM 's cable TV service area.
Yes, you can subscribe to J:COM MOBILE alone.
You can check it easily from the smartphone charge simulation, so please try it.
J:COM will conduct a membership screening when accepting contract applications. Please note that we may not be able to accept your application depending on the results of the screening.
By completing the appropriate settings and procedures, you can continue to use the service on your new device.
Regarding account migration (handover) procedures, security is regularly strengthened, so please check the latest information on LINE's official blog before proceeding.
(*Please note that settings may be required before changing the model)
Solve difficult settings at home. Leave the initial settings of your smartphone to "remote control"!
J:COM MOBILE provides free support that provides detailed instructions on initial settings, migration of phonebook data, instructions on how to use the service, etc. for those who wish to do so.
If you are using a free email service such as Gmail, you can continue to use it by logging in or setting up a new device.
Please note that if you are using an email address (domain) issued by some telecommunications companies, you will not be able to use it.
There are some services that allow you to continue using carrier mail even after canceling your carrier. Please refer here for details.
J:COM MOBILE does not issue email addresses, so we recommend that you switch to a free email such as G-mail in advance.
J:COM MOBILE A Plan line is the same as au. You can connect without problems even in the suburbs or the city center.
J:COM is part of the same group as major carrier au. J:COM MOBILE A Plan uses the au line, and the communication and calling areas will also follow this.
Unused data traffic will be automatically carried over to the next month.
*The remaining amount is valid until the end of the following month.
If the upper limit is exceeded, the speed will be limited to 1Mbps or 200kbps depending on the plan you subscribe to. In addition to the data usage of your contract plan, you can also carry over any additional data usage you purchase to the next month.
Please check here for details such as the expiration date.
If you exceed the upper limit, it will be limited to 1 Mbps or 200 kbps depending on your subscription plan.
If the total amount of data used in the current month exceeds the monthly data volume (including additional data and carry-over data), the communication speed will be restricted as follows until the end of the month.
However, if you want to return to normal speed, you can purchase additional data. You can check the remaining data capacity in the app.
Please see this page for details.
Calls can be used overseas, but data communication is not available.
Please use Wi-FI for email and internet connection.
J:COM MOBILE can be used overseas with the "International Roaming Service (au World Service)" for calls and SMS only.
Mobile data communication is not available overseas, so if you want to use email or the Internet overseas, please use an overseas Wi-Fi router or local Wi-Fi connection service.
Click here for details on how to use overseas
PR
Wi-Ho!, where you can rent a Wi-Fi router for overseas use!
Click here for details
It supports tethering.
Terminals handled by J:COM MOBILE support tethering.
Please purchase a "microSD card". At J:COM MOBILE, you can purchase it at the time of purchasing a "device".
J:COM MOBILE sells microSD cards with a capacity of 128GB as an accessory.
If 128GB is not enough for you, you can purchase it at electronics retailers, but the types of microSD cards that can be used and the maximum capacity differ depending on the model.
When making a purchase, please show the following information to the store staff so that your purchase can go smoothly.
We do not guarantee the operation of any accessories other than those handled by J:COM MOBILE. Please note.
We offer an optional flat-rate call service, “Unlimited calls”.
With this service, domestic calls of up to 5 minutes or 60 minutes are free of charge as many times as you like.
Unlimited calls is only available to subscribers of J:COM MOBILE A Plan.
It cannot be used with J:COM MOBILE D plan SIM Card. Please note.
We offer a wide variety of options, from free repair services to warranty options in preparation for unexpected troubles such as dropping, submersion, and loss of devices.
In the case of a terminal failure, if it is within a certain period of time after purchasing the terminal and the failure is natural, we will repair it free of charge.
If a certain period of time has passed after purchase, it will be charged. Click here for the free warranty period for each product
If you want to prepare for troubles that cannot be covered by repairs or the loss of your device, you can use the paid option "Safe Terminal Warranty 48", "Device Warranty for iPhone" for au Certified iPhones (certified second-hand goods), and "AppleCare+" for iPhones. for iPhone" is recommended.
Additionally, if you are looking for more comprehensive support, we recommend Enkaku Support, where you can consult with specialized staff as many times as you like for J:COM TV, NET, etc.
Please refer to the following for more information.
Inquiries by phone (toll free)0120-919-988 AM 9:00-PM 6:00 [open all year round]
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