Even if you can install the eSIM for Japan, there are cases where it cannot be activated or communication does not start.
The reasons for not being able to activate it can vary, including settings, communication environment, and usage conditions. By checking each one, you may be able to resolve the issue.
In this article, we will introduce the reasons why the Japan eSIM cannot be activated and the points to check in order.
Checklist to Confirm First
| Check Item | Check |
|---|---|
| eSIM is added correctly | □ |
| Mobile data communication is set to eSIM | □ |
| Checked data roaming settings | □ |
| Airplane mode is turned off | □ |
| Device has been restarted | □ |
| Using it within Japan | □ |
By checking these items in order, it will be easier to find the reason for not being able to activate.
Check if eSIM is Added Correctly
First, let's check if the eSIM profile has been added correctly to the device. If the eSIM is not added, activation cannot start.
- Is the eSIM profile displayed?
- Is the eSIM enabled?
- Is an unnecessary eSIM selected?
Check Mobile Data Communication
If mobile data communication is set to a previously used SIM, the Japan eSIM cannot start communication. Check if the Japan eSIM is selected as the line for mobile data communication.
Check Data Roaming Settings
For some Japan eSIMs, it is necessary to turn on data roaming. On the other hand, there are unnecessary services, so please set it according to the instructions of the eSIM you are using.
If You Still Cannot Activate
- Restart the device
- Move to a communication area
- Check APN settings (if necessary)
- Check the eSIM service setup guide
- Contact support
The conditions for starting use vary by service, so please also check the instructions for the eSIM you purchased.
Frequently Asked Questions
I added the eSIM, but I cannot activate it.
Even if the eSIM is added correctly, there may be issues with mobile data communication settings, data roaming, or conditions for starting use that prevent communication from starting. First, check the settings in order.
Do I need Wi-Fi for activation?
It depends on the type of eSIM and the timing of use. Wi-Fi is often required for installation and setup before traveling, but the conditions for starting use vary by service. For details, please check the instructions for the eSIM you purchased.
Can I activate it before arriving in Japan?
It varies by product. Some types allow installation before traveling, with communication starting after arriving in Japan. Please follow the instructions of the eSIM service for the timing of starting use.
Do I need to turn on data roaming?
For some Japan eSIMs, it is necessary to turn on data roaming. The method of setting it varies by service, so please check the official guide.
I can activate it, but I cannot communicate.
Please check if mobile data communication has switched to the Japan eSIM. Also, checking the communication area, APN settings, and restarting the device may help improve the situation.
Should I delete the eSIM and reinstall it?
It is not recommended to delete it immediately. Some eSIMs cannot be reinstalled once deleted. Before deleting, please check with the provider's instructions or support.
What if I still cannot activate it?
If checking the items does not improve the situation, please contact the support of the eSIM service you are using. Providing the device name, error message, and current settings will help facilitate a smoother response.
Summary
Even if the Japan eSIM cannot be activated, there are cases where it can be improved by checking settings and usage conditions. First, check the basic settings and operate according to the eSIM service instructions as needed.
- Check if the eSIM is added correctly
- Switch mobile data communication to eSIM
- Turn on data roaming if necessary
- Restart the device and check the communication area
- If it does not improve, contact support
If you check the setup method before traveling, you can start communication smoothly after arriving in Japan. Enjoy your trip to Japan with peace of mind.
