Turning off the main SIM should not disable a separate travel eSIM, but the phone may lose its previous default for mobile data or temporarily refresh both radios.
Check that the travel line remained enabled and became the explicit mobile-data SIM. Do not assume the phone selected it automatically.
NoveSIM travel eSIMs are data-only and do not replace the primary SIM’s conventional number.
Quick answer: Enable the travel eSIM, select it manually for mobile data, turn on its required roaming setting and refresh network registration. Keep the main SIM off if desired, but do not delete either profile.
Set a new data default
- Open SIM or Cellular settings.
- Confirm the travel eSIM is on.
- Select it under Mobile Data.
- Enable roaming on that line when required.
- Leave network selection automatic.
Use the dual-SIM guide for device-specific context.
Refresh the radio connection
Toggle airplane mode once and wait several minutes. Restart only after confirming the data default.
If manual NoveSIM APN entry is required, use data.esim. Follow the connection checks if data remains unavailable.
Decide whether to keep the main SIM off
Leaving it off prevents calls and SMS to that line and may reduce roaming risk. If it stays on, disable its data access and review operator charges.
The roaming protection guide covers safe dual-SIM settings.
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FAQ
Does the travel eSIM need the main SIM?
No. It can provide data independently when correctly enabled and selected.
Why did mobile data become blank?
The phone may not have assigned a new default after the primary line was disabled.
Can WhatsApp still work?
Yes through eSIM data, while remaining registered to its existing number.
Should I remove the main SIM?
No. Turning it off is sufficient when you do not need its service.
Final Recommendation
Manually assign the travel eSIM as the data line after disabling the primary SIM.
Refresh registration and preserve both profiles while correcting roaming and APN settings.
