What should you do if cellular disappears after deleting an eSIM on iPhone?
Answer
Check whether the AT&T eSIM/SIM was removed by mistake, then re-add the AT&T plan from Settings or AT&T’s official eSIM tools; reinstall Ubigi only after primary carrier service is restored.
Before you start: stop right away if…
- Deleting eSIMs can remove active carrier service until re-provisioned.
- Only use official AT&T and Ubigi activation flows—not emailed QR codes from unknown senders.
Follow these steps
Inspect Cellular plans
Open Settings > Cellular and see whether any AT&T plan remains listed or if the phone shows Set Up Cellular with no lines.
You should see: You know whether the primary AT&T line is missing or only turned off.
Turn the AT&T line on if it is listed
If AT&T still appears, enable Turn On This Line and set it as the default voice/data line, then restart the iPhone.
You should see: Carrier signal returns for AT&T.
Re-add AT&T eSIM if missing
Use Settings > Cellular > Add eSIM and choose the AT&T transfer/QR option from AT&T’s official account tools, or insert the physical AT&T SIM if you have one.
You should see: AT&T appears under Cellular and activates.
Confirm calls and data
Place a test call and open a webpage on cellular before reinstalling any travel eSIM.
You should see: Primary AT&T service works again.
Reinstall Ubigi carefully
Only after AT&T is stable, reinstall the Ubigi eSIM from Ubigi’s official app/QR and assign it as secondary/travel data if desired.
You should see: Both lines show correctly without wiping AT&T again.
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Extra tips
What to look for: Settings > Cellular showing no plans, or only a missing AT&T line after the Ubigi delete.
Before you change anything: Note whether you still have a physical AT&T SIM. Have AT&T account login ready. Do not erase the iPhone to fix missing cellular.