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Application process
(J:COM MOBILE)

恐れ入りますが、ご契約者さまが未成年のお客さまはオンラインでのご契約ができずお電話でのお問い合わせとなります。あらかじめご了承ください。

Flow to use

Step.1 お申し込みのお問い合わせ
Step.2 J:COMからご連絡・お手続き
Step.3 専用フォームでのお手続き（または書面のご提出）
Step.4 商品の発送・お受け取り

MNPをご希望の方へ注意事項

Step.2「J:COMからご連絡・お手続き」のタイミングでMNP予約番号を取得してください。

既に予約発行を済みの場合で、手続き中に期限が切れた場合は、開通手続きの際に予約番号の再取得が必要となります。あらかじめご了承ください。
書面でのご提出の場合、MNP番号の有効期限の都合上、再取得いただく場合がございます。あらかじめご了承ください。

Step 1

お申し込みのお問い合わせ

お申し込みイメージ

複数回線の希望有無、ご連絡希望の曜日と時間帯を選んでください。

混雑状況により、折り返しのご連絡にお日にちをいただく場合がございます。

お問い合わせフォームお電話でお問い合わせ（通話無料）
0120-919-988

AM 9:00～PM 6:00 ［年中無休］

Step.2

J:COMからご連絡・お手続き

J:COMより確認のお電話をいたします。その後、内容に沿って専用フォームからお手続きをお願いします。

書面の郵送手続きをお願いする場合がございます。

MNPをご希望のお客さま

MNP(他社からの乗換)のお客さまは、このタイミングでMNP予約番号の取得をお願いいたします。

ご利用開始までに予約番号の期限が切れた場合は、再取得していただく必要があります。
書面でのご提出の場合、MNP番号の有効期限の都合上、再取得していただく場合がございます。

MNP予約番号の
取得について

Step.3

専用フォームでのお手続き
（または書面のご提出）

お電話での内容確認後、届くメールに記載の専用フォームからお手続きをお願いします。

本人確認書類のアップロード
支払情報の登録（登録が無い場合）

書面でのお手続きの場合、必要書類等を同封の上、ご返送ください。

Step 4

Shipping/receiving products

お受け取りイメージ

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.

設定について詳しくはこちら

We will conduct a membership screening at the time of contract application acceptance. Depending on the results of the review, we may not be able to accept your application, or you may be required to submit payment method restrictions or additional documents.

About data communication

MY J:COM app

You can check the remaining data amount for the current month and purchase additional data.

Learn more

Gigazo Wi-Fi

As a perk, you can use the highly secure public wireless LAN service (Wi-Fi) free of charge.

Learn more

J:COM MOBILE Application

Smartphone savings calculator

Precautions when making a contract

About the use of persons under the age of 18

If 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.

eSIM users, users over the age of 18, and corporate contracts are not eligible.
Click here for details on the Law Concerning the Development of an Environment Where Youth Can Use the Internet Safely and Securely

About payment

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.

取り扱いクレジット会社

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.

If User J:COM and would like to use bank account transfer, you can also use bank transfer directly.

J:COM MOBILE Application

Smartphone savings calculator

FAQ

We introduce frequently asked questions from customers.
If you have any questions, please contact us by phone or chat.

About contracts and fees

Procedures such as contracting and changing models are cumbersome.: 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.

About initial setup support

Those applying for "J:COM MOBILE D Plan SIM Card" are not eligible.

Can I apply for multiple lines?: A maximum of 5 lines can be subscribed to under one contract name.

What happens to the name of the contract if my family members have separate contracts for lines?

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.

Your husband has a contract with Company A → MNP to J:COM MOBILE
Contract with D company in wife's name → MNP to J:COM MOBILE
Contract with S company in your child's name → MNP to J:COM MOBILE

In this case, both the wife and children are contracted in the name of the master.

I have a contract for multiple lines in my family. Can my family pay the monthly usage fee separately?: You cannot pay separately.

Only one type of payment information is required to be registered at the time of contract.

Can I subscribe to J:COM MOBILE no matter where I live in Japan?: 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.

I am using J:COM for the first time. Can I sign a contract for only J:COM MOBILE?: Yes, you can subscribe to J:COM MOBILE alone.

You can check it easily from the smartphone charge simulation, so please try it.

Is there an examination at the time of contract?: 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.

Where can I check what plan I have?: You can check the plan you are subscribed to with J:COM MOBILE on My Page.

Click here for my page

How to check on My Page

About data migration

Can I continue to use LINE on my new device?: 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)

How to transfer your LINE account (as of July 2017)

I want to transfer data such as my phone book to a new smartphone, what should I do?: 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.

Click here for details

Can I continue to use the email address I'm currently using on my J:COM MOBILE smartphone?: 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.

About communication and data

What is the communication area of J:COM MOBILE? I'm worried about whether it will connect properly.: 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.

Click here for details

Can I carry over unused data usage?: 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.

What happens if I exceed my data usage limit?

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.

Customers with a 10GB/20GB contract: maximum transmission/reception of 1Mbps
Customers with a 1GB/5GB contract: maximum transmission/reception of 200kbps

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.

Can J:COM MOBILE smartphones be used overseas?: 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

About options

Can I use tethering?: It supports tethering.

Terminals handled by J:COM MOBILE support tethering.

What kind of SD card should I prepare?

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.

<Supports microSDXC up to 1.5TB>
Samsung Galaxy A25 5G
<Supports up to 1TB microSDXC>
AQUOS sense9/AQUOS sense8/Galaxy A23 5G/BASIO active2/BASIO active/AQUOS wish/AQUOS sense6s/Galaxy A21/AQUOS sense5G
<Supports up to microSDXC 512GB>
AQUOS sense3/Galaxy A30/Galaxy A20/Galaxy Tab A/BASIO4
<Supports up to microSDXC 256GB>
AQUOS L2/HUAWEI P20 lite/BASIO3/HUAWEI MediaPad T5
<Supports up to microSDXC 200GB>
LG X screen/arrows M03/LG G Pad 8.0 III
<Supports up to microSDXC 128GB>
HUAWEI P10 lite/LG G Pad 8.0 L Edition/Xperia Z2 Tablet
<Supports up to microSDHC 32GB>
LG Wine Smart/arrows M02

We do not guarantee the operation of any accessories other than those handled by J:COM MOBILE. Please note.

Does J:COM MOBILE have an "Unlimited calls" plan?: 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.

Click here for details on "Unlimited calls"

Can I use Unlimited calls with any plan?: 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.

What kind of warranty and support system do you have in case of terminal failure or loss?: 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 problems that cannot be covered by repairs or for loss of your device, we recommend the paid option "Peace of Mind Device Warranty 60", "Device Warranty for iPhone" for au Certified iPhones (certified pre-owned products), and "AppleCare+ for iPhone" for iPhone users.

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.

Free repair service

Secure device guarantee 60

Secure device guarantee 48

AppleCare+ for iPhone

Device warranty for iPhone

Enkaku support