Product features｜Purchase Process｜Purchase Guide｜Contact Us｜FAQ｜Manual｜docomo Maintenance Schedule

JB SIM

Japan travel essential

Stay Worry-Free in Japan with Local Emergency Support
Docomo mobile network with the most base stations in Japan

Online Store

Why choose JB SIM？

No ID　No Contract

日本国内でカードを挿入してから有効期間が開始
早めの購入でも旅程変更の心配なし

Japan＆TW Free Shipping

Japan:Courier / Taiwan:Registered Mail
Free Shipping for Japan ＆ Taiwan

Personal Hotspot

※iOS：the personal hotspot’s APN needs to be set up separately.
※Android：the APN is already configured when the service is activated, so there is no need to set up the personal hotspot’s APN separately

docomo MVNO 4G/LTE

docomo MVNO 4G/LTE Mobile Network
Leading in Japan with the highest number of base stations and the widest coverage area.
Experience the difference immediately, even in rural areas.
🌐docomo Mobile Network Coverage Map

Available for early purchase

※iOS: Typically, you can start using it right after inserting the SIM card. If it’s not working, please refer to the “User Manual” and configure the APN.
※Android: After inserting the SIM card, you need to configure the APN before it can be used. The activation setting does not require an internet connection.
※Since this is a product from a Japanese mobile carrier, if it is inserted into a mobile device outside of Japan, it won’t be able to receive docomo signals, so the validity period will not start.

Japanese telecom product

■ Cheaper than international roaming
■ Local Japanese carrier service, no need to enable roaming
■ Faster and more stable than international roaming eSIMs from overseas carriers
■ After data is used up, speed is reduced to 200kbps with unlimited usage
■You can extend the validity period or purchase additional high-speed data. *Excludes unlimited products with a validity of 16 days or 31 days.

Rechargeable & Extendable

No worries if your travel plans change.
you can easily add data and extend the validity.
Unused data can be carried over after extension.

※6/8/16/31days Unlimited cannot be recharged or extended.

Recharge・Extend

Steps to Purchase

📝JB SIM Card Purchase Guide

Product Price

In Japanese Yen (including 10% tax). Since our company is a local communication provider in Japan,
we can provide immediate emergency support for customers within Japan.

Payment Methods

Globally issued credit cards/debit cards, online real-time one-time card payment.

Exchange Rate

The exchange rate set by the customer’s credit card issuing company applies.
Some foreign credit card companies may charge a foreign transaction fee.

Electronic Receipt

Once your payment is successfully processed, an email with the electronic receipt will be sent immediately. If you do not receive the email, it may be due to an error in the email address you entered. Please contact our LINE customer support @913athnc as soon as possible.

Email Verification

If you log in as a member before making a purchase, you won’t need to re-enter your basic information, and you can view your purchase history. If you choose to purchase without logging in, email verification is required to prevent errors in the email address you entered.
After entering your email address, a “Send Verify Email” button will appear. When you click it, a verification email titled “JBMOBILE Online Shopping: Please activate your account” will be sent.
By clicking “Click here” in the email, a message saying “🔔Your email is verified.” will appear on the checkout screen, indicating successful verification.
Once email verification is complete, you can proceed with checkout.

Shipping Method

Currently, shipping is free to Japan and Taiwan.
Japan: Takkyubin (Courier Service)
Taiwan: Post Office Registered Mail. In case of an emergency, it will be sent via express registered mail and can be received on the same day or the following day.

Shipping Time

Typically, orders are shipped the same day or the following day. However, in the case of national holidays, shipping will be delayed until the next business day due to the post office being closed.

Identity Verification

No documents or contracts required.

Order Cancellation

Orders can be canceled if they have not been shipped yet.
Please contact LINE customer support @913athnc with the following information:
“Cancel & Refund Request ➀ Order Number ② Customer Name ③ Customer Email.”
We will process the cancellation and refund promptly.
A 5% card processing fee will be deducted for cancellations due to customer reasons.
*If LINE cannot be used, please email biz@jbrg.jp.

Contact Us

Online Customer Service

Stay Worry-Free in Japan with Local Emergency Support
📩Email biz@jbrg.jp

JB series

Prepaid Internet Plan：JB eSIM｜JB SIM Card｜JB Vocie SIM

Add friends｜Chat

LINE ID：@913athnc

FAQ

Precautions Before Purchase｜docomo Network｜JB SIM Card｜Online Store｜Setup｜Personal Hotspot｜Save Mobile data Usage ｜Smartphone Manual

Precautions Before Purchase

Does my device support esim？

【 iOS Device】

Dial【＊#06#】to open the 「device info」screen.
➔If 「EID」is displayed, you can use eSIM.
➔If only “IMEI” is displayed, please 🌐purchase a SIM card.
📢Many iPhones purchased in China, Hong Kong, and Macau do not support eSIM.

【 Android Device】

The operation method may vary depending on the Android model.
For example, on the Galaxy A55
“Settings” ➔ “About phone” ➔ “Status information”
➔ if “EID” appears on the screen then eSIM is supported.
➔If only “IMEI” is displayed, 🌐purchase a SIM card.

Any SIM restrictions？

【 iOS Device】

「settings」➔「General」➔「About」➔「Carrier Lock」 ➔No SIM restrictions

【 Android Device】

You cannot determine this directly from the mobile phone. Please check with the place of purchase or the carrier you have a contract with.
SIM lock regulations vary by country. In Taiwan, most phones are not SIM-locked.Devices purchased in countries like Japan or the United States are more likely to have SIM lock issues.
📢If you have used SIM cards from different countries or carriers, the device is likely not SIM-locked.

How many GB are needed about 1 day？

How long can 1GB last for internet usage？

How to check my mobile data usage?

【 iOS Device】

🌸View Used Mobile Data
“Settings” ➔ “Cellular”
➔ “Current Period” shows the total mobile data usage for the current period.
Scroll down to see the mobile data usage for individual apps.

🌸Reset Statistics Before Viewing
“Settings” ➔ “Cellular”➔ scroll to “Reset Statistics” to reset the mobile data usage for the “Current Period” to 0. 📢If you want to view the mobile data usage for a different SIM, please first switch the “Cellular Data” SIM.

【 Android Device】

The Android system may have different screens and operation methods depending on the brand and model. Here, we will explain how to check mobile data usage using the Galaxy A55 as an example.

🌸View Data Usage
“Settings”➔”Connections”➔”Data usage”
You can view the total amount of mobile data used in the current billing cycle.

🌸Set Billing Cycle Before Viewing Statistics
“Settings”➔”Connections”➔”Data usage”➔”Billing cycle and data warning”➔to reset the mobile data usage statistics.

How many GB of a product should I purchase?

🅰️ Please refer to the common questions in the “Pre-purchase Check” such as “How many GB are needed in one day?“, “How long can 1GB last for internet usage?” and “How to check my mobile data usage?” to make your decision.

📢 When the high-speed data you purchased runs out, your speed will not be cut off. Instead, it will be reduced to 200kbps, and you can still send text messages normally.

📢 You can always add more data capacity through this website. For urgent requests on holidays or nights, please contact customer service for immediate assistance.

Is the speed of a physical SIM card faster than an eSIM?

The signal strength is mainly affected by the telecommunications company’s network infrastructure. The factors that influence the signal strength are as follows:

The distance to the base station
Presence of obstacles
Presence of signal interference
Antenna performance
Frequency band Since our company’s eSIM and SIM cards are products from Japan’s local docomo telecom company, using the same signal, the speed of our eSIM and SIM cards are the same. As for other international roaming eSIMs, there may be cases where roaming is done through smaller telecom companies, leading to significant differences in speed and coverage.

docomo Network

docomo’s System Maintenance Time

Regular maintenance hours (Japan Time)

Every Tuesday from 10:00 PM to Wednesday 9:00 AM

■eSIM
During the system maintenance period, issuing eSIM activation QR codes will not be possible.
If the “Issue” button has already been pressed, the status will remain as “Pending.”
You may exit the screen and return later via the link to check the issuance result.
If the activation code has already been issued, you can still proceed with “Add eSIM” and begin using the service, even during maintenance.

■SIM Card
Inserting a physical SIM card into a smartphone or other device during the maintenance period may result in no response.
However, there is no need to worry — the system will automatically complete the activation process in order once maintenance is finished.
SIM cards that are already in use will not be affected.

■Voice SIM Card
Voice SIM cards are pre-activated before delivery and are therefore not affected by system maintenance.

Temporary Maintenance hours (Japan Time)

① May 7, 2025, 10:00 PM ～ May 8, 2025, 9:00 AM

■Functions Temporarily Unavailable

New line activation for physical SIMs will not be available
Activation codes for eSIMs will not be issued

■Notes

Physical SIMs that request activation during the maintenance will be activated sequentially after the maintenance ends.
Activation codes requested during the maintenance will be issued sequentially after the maintenance ends.
SIM cards that have already been activated and are in use will not be affected.
Activation codes that have already been issued can still be installed and used during the maintenance period.

Why is it better to choose docomo products for prepaid cards?

🅰️The prepaid card uses a 4G/LTE mobile network, and docomo has the most base stations in Japan, offering the widest coverage. Please refer to the comparison table below.
When you go to areas outside major cities in Japan, you will notice a significant difference.

How can I check if the area I want to use has signal?

🅰️Our company uses the services of Japan’s largest mobile communications company, docomo, which has the widest coverage.
You can use the following website to enter an address and check the 4G/LTE service coverage:
👉docomo Mobile Network Service Area Search

Why am I unable to get a good signal even within the docomo service area?

【Reason 1】Even within the service area, poor signal reception can occur due to obstacles or radio interference. Try moving to a slightly different location and test again.

【Reason 2】If you are using multiple SIM cards or eSIMs at the same time, with all of them set to “on” and set to automatically switch mobile data, it may automatically switch to a SIM with poor signal reception, causing it to be unusable. It is recommended to set the mobile data to your company’s SIM and turn off the automatic switching feature. If you want to use a different SIM, manually switch the mobile data to that SIM.

Why is the signal bar not showing on my iPhone?

🅰️After updating to iOS 17, there may occasionally be an issue where the signal bars do not display the signal strength, but this does not affect reception. You can try the following methods:

Restart the iPhone
Toggle Airplane Mode on and off
Turn mobile data off and on
Check for software updates

JB SIM Card

What sizes are there for SIM cards?

🅰️ 3-in-1 SIM cards (nano, micro, standard).
There are notches around the IC chip for nano, micro, and standard sizes. Use your finger to push out the required size from the back.
Be sure to handle the IC chip carefully when removing it to avoid damaging it.

How long will it take to receive the SIM card after purchase?

🅰️In principle, the item will be shipped on the same day or the next day after purchase.

For the Taiwan region, it will be shipped via registered mail through the post office. Please refer to the official website of the post office. *The shipping method will be based on the buyer’s scheduled start date of use. If it’s too close to the date, we may switch to time-limited registered mail.

For the Japan region, it will be shipped via Takkyubin (courier service). Please refer to the official website of Black Cat Takkyubin.

When does the validity period of the SIM card start to be counted?

🅰️Within Japan, once the SIM card is inserted into a phone or device, it will receive the docomo signal, and regardless of data usage, the validity period will automatically start to be counted.

How can I check the data usage of my SIM Card？

🅰️Since physical SIM cards do not provide online real-time data usage checking services, you need to use the statistics feature on your phone or tablet. Please refer to the “How to check your mobile data usage“

Is it possible to extend the validity period of the SIM card or add more data capacity?

🅰️📢The 6/8/16/31days unlimited SIM cards cannot be extended or topped up. The fixed data SIM cards can have their validity period extended or additional high-speed data added. Please refer to the 🛒SIM_recharge/extension

※Make sure to purchase the extension or top-up products online within the validity period.

※If it is within 7 days after the validity period has expired, top-ups are possible, but the remaining data will be reset to 0.

※Please use your phone or tablet’s statistics feature to check your data usage. Refer to “How to check your mobile data usage”

You can top up or extend within the validity period.
Remaining data and newly added data are treated the same; there is no usage priority between the two.
There is no limit to the number of top-ups or extensions.
If you top up within 7 days after the expiration date, the data balance will be reset to zero, but you can continue using the original eSIM or SIM card.
The extension period is calculated from the 2nd day after the original expiration date, which is considered the first day of the new validity period.
After purchase, in addition to receiving an email with an electronic receipt, you will also receive a separate activation notice from our company via biz@jbrg.jp.
You may request a cancellation before receiving the activation notice. However, a 5% processing fee will be deducted to cover credit card company fees.
If you apply for an extension after 6:00 PM on the last day of validity, please contact customer service for confirmation before making the purchase to avoid delays in processing.
After the initial validity period ends, the online inquiry system [eSIM Activation URL] will no longer reflect the extended validity or remaining data. Please use your mobile device’s data usage statistics instead.
All JBeSIM plans are eligible for top-up and extension. JB SIM cards with data capacity (X-GB) can be topped up, while time-based plans (6/8/16/31 unlimited) cannot be extended.

Recharge・Extend

Can I insert the SIM card into my phone outside of Japan first?

🅰️ Yes, it’s fine.
Since our company’s SIM card is a product from a Japanese telecom provider and not an international roaming type, it will not be activated when inserted into the phone outside of Japan, as it won’t be able to receive the docomo signal from Japan.
To avoid forgetting the SIM ejector tool when traveling abroad or accidentally losing the SIM card while out, we recommend inserting the SIM card into the phone ahead of time.
For dual-SIM phones, typically the SIM card you’re using is inserted in the SIM1 slot, so you can insert the Japanese SIM card into the SIM2 slot as a backup.
※The SIM card will display “No Service/Unknown Number”.

Online Store

Is the product price only in Japanese yen?

🅰️Since our company is a local phone company in Japan, all product prices are in Japanese yen.
When paying with a credit card (Credit) or debit card (Debit) issued outside of Japan, some issuers may charge foreign transaction fees depending on their policies. Please inquire directly with the card issuer for more details.

Can I pay with a debit card?

🅰️You can pay with a debit card.
When paying with a credit card (Credit) or debit card (Debit) issued outside of Japan, some issuers may charge foreign transaction fees depending on their policies. Please inquire directly with the card issuer for more details.

Can I change the order details?

🅰️We apologize, but it is not possible to directly change the order details. Please contact our company through the official LINE account, and we will assist you with making the changes.

Can I cancel the order and get a refund?

🅰️JB eSIM & JB SIM Card
You can cancel the refund if the 【eSIM Activation URL】 has not been sent yet or if the physical SIM card has not been mailed.
To cancel, please contact our company via the official LINE account (@913athnc), input “Request for refund cancellation,” and provide your ①order number ②name of the purchaser ③purchaser’s email address. Our company will process the cancellation as soon as possible.
If you cannot use LINE, please contact our company via email (info@jbrg.jp).
📢If the cancellation is requested due to the customer’s reason, a 5% handling fee will be deducted by the credit card company. If the cancellation is due to our company’s reason, a full refund will be provided.

🅰️JB Voice SIM
Since a Japanese phone number will be issued after purchase, refunds cannot be canceled. If there are special reasons, please inquire through the official LINE account.

What should I do if my flight is delayed or canceled due to a typhoon or other reasons?

🅰️JB eSIM
Since our products allow customers to choose when to issue the QR code, please make sure to check that your flight is not canceled or delayed before proceeding with the “issue” process. As long as the issuing process is not completed, you can use it later. If you accidentally delete the 【eSIM Activation URL】 for activation, you can request to have it resent via the official LINE account.

🅰️JB SIM Card
As long as the SIM card is not inserted into a phone or tablet and does not receive the docomo signal in Japan, it will not be activated. You can use it later.

🅰️Voice SIM Card
If you have already reserved the issuance of a phone number abroad, it cannot be canceled or refunded. If you have canceled your trip to Japan, please contact us through the official LINE website.

Setup

Is there free Wi-Fi service at airports in Japan?

🅰️If you are unable to activate your service immediately upon arriving at a Japanese airport, please use the airport’s Wi-Fi to contact our customer service. For detailed specifications, please refer to the official websites of the respective airports:
【New Chitose Airport】: https://www.new-chitose-airport.jp/ja/service/internet_fax_copy/lan/
【Hakodate Airport】: https://www.airport.ne.jp/facility/wifi/
【Sendai Airport】: https://www.sendai-airport.co.jp/service/wifi.html
【Narita International Airport】: https://www.narita-airport.jp/jp/service/svc_33_wire
【Haneda Airport】: https://tokyo-haneda.com/service/facilities/wireless_lan.html
【Chubu Centrair International Airport】: https://www.centrair.jp/service/wireless-lan.html
【Kansai International Airport】: https://www.kansai-airport.or.jp/service/internet/06.html
【Fukuoka Airport】: https://www.fukuoka-airport.jp/service/wifi01.html
【Kumamoto Airport】: https://www.kumamoto-airport.co.jp/facilities/kumamoto-free-wi-fi/
【Naha Airport】: https://www.naha-airport.co.jp/service/wifi/wifi-spot/

If I leave Japan and return later, can I still use it?

🅰️It can be used as long as it is within the valid period. When you return to Japan, simply switch the mobile data to the Japanese SIM to use it.

How can I avoid using international roaming on my original SIM card?

🅰️By selecting the Japanese SIM for mobile data and turning off the automatic data switch function, you will basically not use the original SIM and still be able to receive SMS. Receiving SMS from Taiwan is free, but please contact your carrier for other countries. If you don’t want to receive SMS or are concerned about high roaming charges, you can temporarily turn off the original SIM by following the steps below and re-enable it after returning home.

■iPhone
【Settings】 ➡【Cellular】 ➡【Select the label of the original SIM】 ➡ Turn off the option “Turn on this number.”

■Android
The operation method may vary depending on the brand.
※Samsung
【Settings】 ➡【Connections】 ➡【SIM card manager】 ➡【Select the label of the original SIM】 ➡ OFF.

Personal Hotspot

Can I use a personal hotspot for free? Do I need to apply for it?

🅰️You can use the personal hotspot service for free without an additional application, but you need to set the APN for the personal hotspot.

How to set up a personal hotspot?

【iOS Device】

iOSデバイスでテザリングを使って、コンピュータなどの他のデバイスとインターネットを共有する場合、まずインターネット共有のAPNを設定する必要があります。

On iOS, to use the personal hotspot to share the internet with computers or other devices, you must first set the APN for the personal hotspot.

◆ Single SIM
① “Settings” ➡ ② “Cellular” ➡ ③ “Cellular Data Network” ➡ ④ Enter the 【APN】, 【Username】, and 【Password】 for “Cellular Data” and “Personal Hotspot”

◆ Multiple SIMs
① “Settings” ➡ ② “Cellular” ➡ ③ Select the label for the SIM that needs to be set for the personal hotspot ➡ ④ “Cellular Data Network” ➡ ⑤ Enter the 【APN】, 【Username】, and 【Password】 for “Cellular Data” and “Personal Hotspot”

※Since each SIM has its own APN, make sure to select the correct label in step ③.
※Since the data is being shared for internet access, typically, the label for “Cellular Data” is selected.

※After setting it up, the “Personal Hotspot” option will appear in the “Settings” menu. Turn on “Allow Others to Join” and it’s recommended to change the Wi-Fi password before you start using it.
※To find the Wi-Fi name, go to “Settings” ➡ “General” ➡ “About” ➡ “Name.”

【Android Device】

📢 After adding an eSIM or inserting a physical SIM card on an Android device, you must configure the APN before it can be used. Once set up, you can access the internet and use the personal hotspot. The steps may vary slightly depending on the brand.

【SAMSUNG】 APN Settings
「Settings」➡「Connections」➡「Mobile networks」➡「Access Point Names」➡ Tap the「+」in the top-right ➡Enter the 【APN settings information】 shown below.

How do I turn on the personal hotspot or change the password?

■iOS

Go to “Settings” > “Personal Hotspot” > turn on “Allow Others to Join” to share your internet connection with other devices.
If you want to change the password, simply tap “Wi-Fi Password.”
To check or change the Wi-Fi name, go to “Settings” > “General” > “About” > “Name”, then tap to edit it.

■Android

The setup process may vary depending on the manufacturer and model of the Android device. Below are the steps for the SAMSUNG A55:

Go to “Settings” > “Connections” > “Mobile Hotspot and Tethering”, then turn on “Mobile Hotspot” to share your internet connection with other devices.
Tap “Mobile Hotspot”, then tap “Network name” or “Password” to open the “Configure Mobile Hotspot”, where you can change the network name and password.

I followed the instructions but cannot use the personal hotspot.

◆ If you are using multiple SIM cards or eSIMs at the same time, please ensure that the APN you set is for the SIM card or eSIM you intend to use. Many people accidentally set the APN for a different SIM card or eSIM.

◆ After setting the APN, please restart your device and try again.

◆ Please carefully check if the information you entered is correct.

※Due to differences in devices and OS, we cannot guarantee functionality, but we have not received any reports of issues with usage.

Can I set up the personal hotspot APN in advance while outside Japan?

🅰️ Yes, it is possible.
You can set up the APN in advance, but you won’t be able to test whether it works properly while outside Japan.
Our product does not support international roaming, as it is designed for use with Japanese mobile carriers. Therefore, it can only be officially activated and used after arriving in Japan.

If I use multiple SIM cards or eSIMs at the same time, do I need to set separate hotspot names and passwords for each one?

🅰️ No, it’s not necessary.
Each device has only one hotspot name and password, which are shared across all SIM cards and eSIMs.
※ What needs to be configured individually is the hotspot APN for each SIM card or eSIM.

How to Save Mobile Data Usage？

【iPhone】 How to Save Mobile Data Usage

◆ Turn off background app refresh using mobile data
Go to “Settings” → “General” → “Background App Refresh”
Since most apps don’t need real-time updates, it’s recommended to set this to “Wi-Fi” so mobile data isn’t used.

◆ Turn off “Wi-Fi Assist”
Go to “Settings” → “Cellular” → Turn off “Wi-Fi Assist.” When Wi-Fi connection is poor, the system won’t automatically use mobile data.

◆ Turn off mobile data for iCloud backup
Go to “Settings” → “Cellular” → “iCloud Backup,” and turn it off so mobile data won’t be used for automatic iCloud backups.

【YouTube】 How to Save Mobile Data Usage

◆ Enable “Data Saver” mode
Tap your profile picture in the YouTube app → Go to Settings → Video quality preferences → Under Mobile networks, select Data saver.

◆ Adjust “Video Quality Preferences”
Open the YouTube app → Tap your profile picture → Settings → Video quality preferences → For Mobile networks, choose Data saver (e.g., 480p or lower).

◆ Turn off “Autoplay next video”
Tap your profile picture → Settings → Playback → Toggle off Autoplay next video.
This prevents continuous playback in case you fall asleep or forget to stop the video.

◆ Limit video preloading while browsing your feed
Tap your profile picture → Settings → Playback → Set Play videos in feeds to Off or Wi-Fi only.

◆ Turn off mobile data usage for the YouTube app
For iPhone:
Go to Settings → Mobile Data → Find YouTube → Toggle off to disable mobile data usage.

For Android:
Go to Settings → Apps → YouTube → Mobile data & Wi-Fi → Turn off Allow background data usage.

【Facebook】 How to Save Mobile Data Usage

◆Stop videos from auto-playing in your Facebook news feed
https://www.facebook.com/help/1406493312950827/?helpref=uf_share

◆Adjust the number of photos you want to see to control the data usage and loading speed on Facebook.
https://www.facebook.com/help/mobile-basic/656932384361200/

＜Quoted from Facebook＞

【Instagram】 How to Save Mobile Data Usage

By default, Instagram preloads videos so they start faster whenever possible. If you want to help reduce the amount of cellular data the Instagram app uses, you can choose not to have Instagram preload videos over cellular connections.

◆iPhone設定方法
https://www.facebook.com/help/instagram/379494505495970?cms_platform=iphone-app&helpref=platform_switcher&locale=zh_HK

◆Android設定方法
https://www.facebook.com/help/instagram/379494505495970?cms_platform=android-app&helpref=platform_switcher&locale=zh_HK

＜Quoted from Instagram＞

Links to user manuals for popular smartphone models

SAMSUNG

Quotation from “SAMSUNG Download drivers, manuals, software and more. “
https://www.samsung.com/us/support/downloads/?model=N0002100

Manual

JB SIM Card

SIM Card Manual_Android

docomo system maintenance schedule

Regular maintenance hours (Japan Time)

Every Tuesday from 10:00 PM to Wednesday 9:00 AM

■Voice SIM Card
Voice SIM cards are pre-activated before delivery and are therefore not affected by system maintenance.

Temporary Maintenance hours (Japan Time)

① May 7, 2025, 10:00 PM ～ May 8, 2025, 9:00 AM

■Functions Temporarily Unavailable

New line activation for physical SIMs will not be available
Activation codes for eSIMs will not be issued

■Notes

Physical SIMs that request activation during the maintenance will be activated sequentially after the maintenance ends.
Activation codes requested during the maintenance will be issued sequentially after the maintenance ends.
SIM cards that have already been activated and are in use will not be affected.
Activation codes that have already been issued can still be installed and used during the maintenance period.