1. Installing on weak Wi-Fi or right before your flight
Symptom: the QR code scans halfway, the profile download fails, or the profile never appears in settings after install.
Fix: install at home on stable Wi-Fi at least a day before you fly, so you have time to sort out problems. If you must install at the airport, use the terminal Wi-Fi and delete the broken profile before trying again, following your provider’s instructions. Not sure what the correct process looks like? Read the eSIM installation guide first.
2. Installed, but no signal
Symptom: the profile is listed in settings, but the phone has no service and no internet.
Three usual culprits:
- The eSIM is not set as the default data line, so the phone still routes through your old SIM.
- Data roaming is not enabled for the eSIM — required by most travel plans.
- The plan only activates once it connects to a supported network at your destination, and you are still at home.
Fix: open your mobile data settings, set the eSIM as the default data line, enable data roaming for it, and turn data off on your home SIM to avoid roaming charges. If your plan activates on first connection, having no signal at home is exactly right.
3. Deleting the profile assuming you can reinstall it
Symptom: you delete the profile to tidy up, and next day the installation code no longer works.
Fix: many eSIM profiles are issued for one device and one installation — delete means gone. If you already deleted it, contact your provider immediately before buying anything new. The good habit: never delete a profile unless you are certain the plan will not be used again.
4. Activating the plan too early
Symptom: you install the profile two weeks before departure and land to find part of the validity has already been consumed.
Fix: read each plan’s activation terms before installing. Plans that activate on install should be installed close to departure; plans that activate on first network connection can be installed from home at any time. A small detail that decides whether you lose days for nothing.
5. A phone that does not support eSIM or is carrier-locked
Symptom: no eSIM section appears in settings, or the installed profile gets rejected.
Fix: check before you buy using the compatibility guide. Note that phones bought on carrier installment plans are often locked — they need to be unlocked by that carrier before accepting another provider’s profile.
The two-minute checklist before your flight
- The eSIM profile is installed and visible in settings.
- The eSIM is your default data line, with data roaming enabled.
- Data on your home SIM is switched off.
- You know your plan’s data allowance and validity.
- The QR code or profile details are saved somewhere findable.
If something breaks mid-trip, hotel Wi-Fi plus your provider’s help page are your friends. But installing correctly at home rules out almost all five mistakes above — it takes less than ten minutes before you fly.