If an eSIM stopped working after you changed the mobile-data line, the phone is probably routing internet traffic through another SIM. The eSIM profile itself has not normally been damaged.
Calls, messages and mobile data can have different defaults on a dual-SIM phone. Changing one does not always change the others.
Keep the travel eSIM installed. This problem is usually corrected in SIM settings without another QR-code scan.
Quick answer: Re-select the travel eSIM as the mobile-data line, enable its required roaming setting and turn off automatic cellular-data switching. Test with Wi-Fi off and confirm that the travel line’s counter increases.
Restore the correct data SIM
- Open SIM manager, Cellular or Mobile Service.
- Confirm the travel eSIM is enabled.
- Select it under Mobile Data or Cellular Data.
- Disable automatic data switching or backup data.
- Enable data roaming on the travel line when required.
Use the complete dual-SIM switching guide if the calling and data defaults are unclear.
Check whether the home SIM took over
Turn Wi-Fi off and inspect the status bar and per-line data counter. If the home SIM is transferring data abroad, disable its data access immediately to prevent roaming charges.
Follow the roaming-charge protection checklist before testing again.
If the correct line is selected but data fails
Confirm plan validity and destination coverage, then toggle airplane mode once. Leave network selection automatic initially.
For manual NoveSIM APN entry, use data.esim. Continue with the no-internet diagnostic if signal appears without working data.
Keep calls and WhatsApp separate
NoveSIM travel plans are data-only. Keep the primary SIM for conventional calls and SMS if required, while WhatsApp and other internet apps use the selected eSIM data.
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FAQ
Does switching the data line delete an eSIM?
No. It changes which installed SIM supplies mobile internet.
Can calls stay on my primary SIM?
Yes on supported dual-SIM phones, while the travel eSIM handles data.
Why does Wi-Fi hide the problem?
Apps can work through Wi-Fi even when the wrong SIM is selected for mobile data.
Should automatic data switching be on?
Usually not abroad, because it may move data to the home SIM and create roaming charges.
Final Recommendation
Restore the travel eSIM as the explicit data line and disable automatic switching before further troubleshooting.
Test with Wi-Fi off, preserve the profile and correct roaming or APN only if line selection is already right.
