After arriving in Japan, it can be troublesome if your smartphone cannot connect to the internet. You may not be able to use Google Maps, transit apps, or translation apps, which can affect your travel plans.
The reasons for connectivity issues can vary, including mobile data settings, data roaming, and APN settings.
In this article, we will introduce the steps to check and troubleshoot connectivity issues after arriving in Japan, in a way that is easy for beginners to understand.
Checklist to Confirm First
| Check Item | Check |
|---|---|
| Airplane mode is turned off | □ |
| eSIM or SIM is activated | □ |
| Mobile data is set to the eSIM | □ |
| Checked data roaming settings | □ |
| Restarted the device | □ |
| Moved to a service area | □ |
In many cases, checking the above items can resolve the issue.
Check Mobile Data
If you are using an eSIM, check if the mobile data is switched to the Japan eSIM. If it remains on the main line, you may not be able to connect.
- Check mobile data
- Select the eSIM to use
- Recheck the connectivity status
Check Data Roaming Settings
Depending on the eSIM you are using, you may need to turn on data roaming. However, some services may not require it, so please check the instructions for the eSIM you purchased.
Restart the Device
If you cannot connect after changing settings, restarting your smartphone may help. After restarting, wait a few minutes before checking the connectivity status.
If You Still Cannot Connect
- Check APN settings (if necessary)
- Confirm that the eSIM is installed correctly
- Check the status of SIM lock
- Contact the support of the eSIM service you purchased
The cause of connectivity issues is not always one thing. By checking each item one by one, it becomes easier to identify the cause.
Frequently Asked Questions
I cannot connect even after arriving in Japan. What should I check first?
First, check that airplane mode is off, that the eSIM or SIM is activated, and that mobile data is set to the correct line. After that, restart the device and check the connectivity status.
Do I need to turn on data roaming?
It depends on the eSIM service you are using. Some Japan eSIMs require data roaming to be turned on. For details, please check the setup guide for the eSIM you purchased.
What should I do if it says "No Signal"?
After moving to a service area, try restarting the device. If it still does not improve, check if the eSIM is activated and if the mobile data settings are correct.
Should I check the APN settings?
Most eSIMs have the APN set automatically, but if you cannot connect or if the provider has instructions, it is reassuring to check. The necessary settings may vary depending on the eSIM service.
I can connect to Wi-Fi, but I cannot use mobile data.
In this case, check the mobile data settings, the activation of the eSIM, and the APN settings. Turning off Wi-Fi and conducting a connectivity test can help isolate the issue.
What should I do if restarting does not improve the situation?
Check the eSIM settings and the status of the SIM lock. If it still does not improve, please contact the support of the eSIM service you purchased. Providing error messages or details from the settings screen will help them assist you more smoothly.
Is there a way to prevent connectivity issues during my trip to Japan?
By setting up the eSIM before your trip and checking compatible devices, SIM lock, QR codes, and mobile data settings, you can reduce troubles on-site.
Conclusion
Even if you cannot connect after arriving in Japan, many issues can be resolved by checking the settings. Take your time to check mobile data, data roaming, and APN settings in order.
- Check airplane mode and eSIM status
- Switch mobile data to the correct line
- Turn on data roaming if necessary
- Restart the device
- If it does not improve, contact support
If you check the setup methods before your trip, you can use the internet with peace of mind after arriving in Japan. Enjoy a comfortable trip in Japan.
