If your China eSIM is not working, don’t worry. Most connectivity problems can be solved in just a few minutes by checking your phone settings.
The most common causes include selecting the wrong SIM for mobile data, Data Roaming being disabled, missing APN settings, Automatic Data Switching being enabled or trying to use the eSIM before arriving in China.
Quick answer: make sure your China eSIM is turned on, selected for Mobile Data, Data Roaming is enabled, your primary SIM roaming is turned off and the APN is set to data.esim if manual configuration is required.
Top China eSIMs
Quick Troubleshooting Checklist
| Check | Correct Setting |
|---|---|
| China eSIM enabled | Yes |
| Selected for Mobile Data | Yes |
| Data Roaming | ON for China eSIM |
| Primary SIM Roaming | OFF |
| Automatic Data Switching | OFF |
| Network Selection | Automatic |
| APN | data.esim if required |
| Phone Restarted | Yes |
Problem 1: No Mobile Data
If your phone shows signal but websites or apps do not load, check the following:
- Select the China eSIM for Mobile Data.
- Enable Data Roaming.
- Turn off Automatic Data Switching.
- Restart your phone.
- Toggle Airplane Mode for 30 seconds.
- Verify the APN.
Problem 2: No Signal
If your phone cannot find a network:
- Wait a few minutes after arrival.
- Move outdoors or near a window.
- Keep Network Selection on Automatic.
- Restart your phone.
- Make sure you are physically in China.
Problem 3: eSIM Installed but Not Connecting
An installed eSIM does not automatically mean mobile data is active.
Verify that:
- The eSIM line is turned ON.
- The China eSIM is selected for Mobile Data.
- Data Roaming is enabled.
- The phone is unlocked.
- Your plan is valid.
Recommended Settings
| Setting | Recommended Value |
|---|---|
| Mobile Data | China eSIM |
| Calls | Primary SIM |
| SMS | Primary SIM |
| Data Roaming (China eSIM) | ON |
| Data Roaming (Primary SIM) | OFF |
| Automatic Data Switching | OFF |
| Network Selection | Automatic |
| APN | data.esim |
APN Settings
If your phone does not automatically configure the APN, enter it manually.
| Field | Value |
|---|---|
| APN | data.esim |
| Username | Leave blank |
| Password | Leave blank |
| Authentication | None |
Restart Your Phone
A simple restart often resolves temporary network registration issues.
- Turn your phone off.
- Wait 30 seconds.
- Turn it back on.
- Wait several minutes for network registration.
Try Airplane Mode
Another common solution is refreshing the network connection.
- Enable Airplane Mode.
- Wait 30 seconds.
- Disable Airplane Mode.
- Wait for the network to reconnect.
Check Network Selection
Keep Network Selection on Automatic.
Manual selection can prevent the eSIM from connecting to the correct partner network.
Can You Keep Your Home SIM?
Yes. Your primary SIM can remain active for calls and SMS.
- China eSIM for data.
- Primary SIM for calls.
- Primary SIM roaming OFF.
- Automatic Data Switching OFF.
Does WhatsApp Work?
Your WhatsApp account remains linked to your existing phone number.
However, travelers should know that some online services and messaging platforms may be affected by internet restrictions in China. Availability depends on network routing and local regulations.
Common Reasons a China eSIM Does Not Work
- Trying to use the eSIM before arriving in China.
- Data Roaming disabled.
- Wrong SIM selected.
- Phone is carrier locked.
- Phone does not support eSIM.
- Automatic Data Switching enabled.
- Incorrect APN.
- Poor coverage in remote areas.
- Deleted eSIM profile.
- Software needs updating.
Coverage Issues
Coverage is generally excellent in:
- Beijing
- Shanghai
- Guangzhou
- Shenzhen
- Xi’an
- Chengdu
Coverage may be weaker in remote mountains, deserts, rural villages and western China.
Step-by-Step Recovery Guide
- Restart your phone.
- Enable Airplane Mode for 30 seconds.
- Turn on the China eSIM.
- Select it for Mobile Data.
- Enable Data Roaming.
- Disable Automatic Data Switching.
- Check APN settings.
- Keep Network Selection on Automatic.
- Move outdoors.
- Wait several minutes.
When Should You Contact Support?
If none of the above steps solve the problem, contact support with:
- Your phone model.
- Your current location in China.
- A screenshot of your Mobile Data settings.
- A screenshot showing the installed eSIM.
- The network currently displayed on your phone.
Related China eSIM Guides
- China eSIM
- Install China eSIM
- Activate China eSIM
- Use China eSIM
- China eSIM for iPhone
- China eSIM for Android
- APN Settings
- No Internet on China eSIM
FAQ
Why is my China eSIM not working?
The most common reasons are disabled Data Roaming, incorrect Mobile Data selection, Automatic Data Switching being enabled or missing APN settings.
Should Data Roaming be enabled?
Yes. Enable Data Roaming on the China eSIM while keeping it disabled on your primary SIM.
What APN should I use?
If manual configuration is required, use data.esim.
Should I manually choose a network?
No. Leave Network Selection on Automatic unless instructed otherwise by support.
Can I restart my phone?
Yes. Restarting the phone and toggling Airplane Mode often fixes temporary network registration issues.
Can I keep my home SIM?
Yes. Keep your home SIM for calls and SMS while using the China eSIM for mobile data.
Final Recommendation
Most China eSIM issues can be solved by checking a few settings. Make sure the China eSIM is selected for Mobile Data, enable Data Roaming, disable Automatic Data Switching, keep Network Selection on Automatic and use the APN data.esim if manual configuration is required.
If the connection still does not work after restarting your phone and refreshing the network, collect screenshots of your settings and contact support for further assistance.