When using eSIM, you may encounter issues such as, "Cannot connect to 5G" "Even though it's a 5G compatible smartphone, only 4G or LTE is displayed."
The reasons for not being able to connect to 5G are not solely due to the eSIM. Factors such as device compatibility, communication plans, smartphone settings, and the area you are in all play a role.
In this article, we will clearly explain the main reasons for not being able to connect to 5G with eSIM and the troubleshooting methods you should check in order.
Main Reasons for Not Connecting to 5G with eSIM
| Reason | What to Check |
|---|---|
| eSIM plan does not support 5G | Check the communication specifications of your plan |
| Smartphone does not support 5G | Check the device's supported frequencies and specifications |
| 5G setting is off | Check mobile communication settings |
| Outside of 5G area | Move to a different location and check again |
| Unstable signal | Check in an outdoor or different location |
| Temporary network condition | Try restarting or toggling airplane mode on and off |
First, it is important to confirm that both your eSIM plan and smartphone are compatible with 5G.
Check if Your eSIM Plan Supports 5G
Just because you have an eSIM does not mean you can necessarily use 5G. Some products may only support 4G or LTE.
Check the product page or user guide of the eSIM you purchased to see if it supports 5G.
- Is there a mention of 5G compatibility?
- The communication provider you will use
- Conditions for high-speed communication
- Supported areas
If your plan does not support 5G, even if your device is 5G compatible, it will connect using 4G or LTE.
Check if Your Smartphone is 5G Compatible
To use 5G communication, your smartphone itself must also be compatible with 5G.
Additionally, even among 5G compatible models, the supported frequency bands may differ depending on the country or region where you purchased it. It is also reassuring to check compatibility with the network you will use in Japan.
- Is your device a 5G compatible model?
- Does it support the frequencies used in Japan?
- Is the OS up to date?
Check Your Smartphone's 5G Settings
Depending on the device, you may be able to change how 5G is used in the mobile communication settings.
If there are settings such as "5G Auto," "5G On," or "Preferred Network," check the current settings.
- Open "Settings"
- Open Mobile Data or Mobile Network
- Select the eSIM you are using
- Check Voice and Data or Preferred Network
- Confirm if the setting allows for 5G usage
The names of the settings may vary depending on the device, whether it's an iPhone or Android, and the manufacturer.
Check if You are in a 5G Area
Even if you are using a 5G compatible eSIM and smartphone, if you are currently in an area outside of 5G coverage, you will connect using 4G or LTE.
In basements, inside buildings, rural areas, or mountainous regions, 4G may provide a more stable connection than 5G.
- Move outdoors
- Check outside of stations or buildings
- Change locations and check the connection display
If You Can Still Communicate Without Connecting to 5G, Is That Okay?
If you are able to use the internet normally on 4G or LTE, it does not necessarily indicate a communication problem.
Google Maps, web searches, social media, and messaging apps can all be used sufficiently on 4G or LTE. There is no need to delete your eSIM or make significant changes to your settings just because it is not displaying 5G.
What to Do If You Still Cannot Connect to 5G
- Toggle airplane mode on and off once
- Restart your smartphone
- Update the OS to the latest version
- Check mobile network settings
- Check the connection in a different location
- Confirm the 5G compatibility conditions with your eSIM provider
If you are informed that 5G is supported but cannot connect to 5G in a supported area for an extended period, it is advisable to check with the support of the eSIM service.
Frequently Asked Questions
Is it a malfunction if only 4G or LTE is displayed even though I have an eSIM?
It does not necessarily indicate a malfunction. If you are outside of a 5G coverage area or if the eSIM plan you are using does not support 5G, your smartphone may connect using 4G or LTE depending on the settings.
Will a 5G compatible smartphone always connect to 5G?
No. It also depends on the eSIM plan you are using, the communication provider, supported frequencies, and the 5G coverage area at your current location.
Can I use the internet even if I cannot connect to 5G?
Yes. If you are able to communicate normally on 4G or LTE, you can often use Google Maps, social media, web searches, and messaging apps without any issues.
Where can I check the 5G settings?
On iPhone, you can check in the mobile data line settings, while on Android, you may find it under mobile network or preferred network settings. The names of the displayed items may vary depending on the device and OS.
Will turning on data roaming enable 5G?
Data roaming may be necessary for communication with a travel eSIM, but simply turning it on does not guarantee a connection to 5G. To use 5G, you need to meet the conditions of the plan, device, network, and area.
Is it a problem if it frequently switches from 5G to 4G?
It is not necessarily a problem. Smartphones may automatically switch between 5G and 4G/LTE depending on the signal conditions. This is especially common in basements, inside buildings, or while moving.
Can I experience issues connecting to 5G even in urban areas of Japan?
Yes. Even in urban areas, you may connect to 4G or LTE instead of 5G in places like inside buildings, basements, or crowded areas. Try moving to a different location and check again.
What should I do if I cannot connect to 5G no matter what I try?
Please double-check if your eSIM is 5G compatible and if your device is compatible with Japan's 5G network. If you meet the compatibility conditions but still cannot connect, contact the support of your eSIM provider.
Conclusion
Even if you cannot connect to 5G with eSIM, it does not necessarily mean there is a malfunction or communication issue. 5G availability can vary based on multiple conditions, including the device, eSIM plan, communication area, and smartphone settings.
- Check if your eSIM plan supports 5G
- Check if your smartphone is 5G compatible
- Check 5G and preferred network settings
- Check if you are in a 5G area
- If you can communicate normally on 4G or LTE, do not rush to change settings
- If issues persist, check with your provider
During your trip to Japan, it is important not only to see the 5G display but also to ensure that you can use the internet comfortably. If you are able to communicate normally on 4G or LTE, it is often fine to continue using it as is.
