When using eSIM in Japan, there may be times when your smartphone displays "Out of Service" and you cannot connect to the internet.
The reasons for being out of service are not just one, and various factors such as settings, communication areas, and the condition of the device can be considered.
In this article, we will clearly explain the main reasons why Japan's eSIM may be out of service and the troubleshooting methods you want to check in order.
Checklist to Confirm First
| Check Item | Check |
|---|---|
| Airplane mode is off | □ |
| eSIM is enabled | □ |
| Mobile data communication is set to eSIM | □ |
| Checked data roaming settings | □ |
| Restarted the smartphone | □ |
| Moved to a communication area | □ |
There are many cases where simply confirming these can lead to improvement.
Check if eSIM is Enabled
First, check in the settings screen if the eSIM for Japan is enabled. If the eSIM is off, it may display "Out of Service."
- Is the eSIM turned on?
- Is eSIM selected for mobile data communication?
- Are you accidentally using an unnecessary SIM?
Check Data Roaming Settings
Depending on the eSIM you are using, you may need to turn on data roaming. On the other hand, some services do not require this setting. For details, please check the instructions for the eSIM service you purchased.
Try Moving to a Different Communication Area
In basements, deep inside buildings, or mountainous areas, it may be temporarily difficult to receive signals. Move outdoors or to another location and check if you can connect again.
If You Are Still Out of Service
- Restart the device
- Check APN settings (if necessary)
- Check if you can reconfigure the eSIM (follow the provider's instructions)
- Check if the device is eSIM compatible
- Contact eSIM service support
By checking each one, it becomes easier to identify the cause.
Frequently Asked Questions
Why does eSIM display "Out of Service"?
There are various reasons for displaying "Out of Service." It may be due to the eSIM not being enabled, mobile data communication settings, data roaming, signal conditions, or device settings. By checking each one, it becomes easier to identify the cause.
Is "Out of Service" the same as "Cannot Connect"?
Not necessarily the same. "Out of Service" indicates a state where you cannot connect to the mobile phone network. On the other hand, if there is a signal display but you cannot use the internet, other causes such as mobile data communication or APN settings may be considered.
Will restarting the device improve the situation?
Yes. After changing settings or right after arriving in Japan, restarting the device may reconnect to the network and improve the situation.
Do I need to turn on data roaming?
It depends on the eSIM service you are using. Some eSIMs for Japan require data roaming to be turned on. For details, please check the setup guide for the eSIM you purchased.
Can I still be out of service even in a communication area?
Yes. In basements, inside high-rise buildings, or mountainous areas, the signal may temporarily weaken. Moving outdoors or to another location may improve the situation.
Will reinstalling the eSIM improve the situation?
Depending on the eSIM, it may be possible to reinstall it, but some services use QR codes that can only be used once. Before deleting or reconfiguring, be sure to check the instructions from the eSIM provider.
What if I am still out of service?
If you have checked the checklist and still cannot connect, please contact the support for the eSIM service you are using. Providing the device name, location, displayed error messages, and the contents of the settings screen will help identify the cause.
Conclusion
Even if eSIM displays "Out of Service" in Japan, in many cases, it can be improved by checking settings and communication environments. Stay calm and check the basic items in order.
- Check airplane mode and eSIM status
- Switch mobile data communication to eSIM
- Turn on data roaming if necessary
- Try restarting the device or moving to a different communication area
- If it does not improve, contact the eSIM provider
If you check the setup methods and usage procedures before your trip, you can respond calmly even if troubles occur on-site. For a comfortable trip to Japan, make sure to prepare in advance.
