Landed and No Data? The Complete eSIM Troubleshooting Checklist

You have landed, switched off aeroplane mode, and nothing. No bars on the eSIM, or bars but no internet. Before you panic or buy an overpriced airport SIM, work through this checklist in order. It resolves the overwhelming majority of cases in under five minutes, because most eSIM problems are settings problems, not faulty eSIMs.

Step 1: Toggle Aeroplane Mode

Aeroplane mode on, count to ten, aeroplane mode off. This forces your phone to search for networks from scratch. It is cliche because it works, especially right after landing when your phone may still be clinging to the memory of your home network.

Step 2: Is the eSIM Actually Turned On?

Go to your SIM settings (iPhone: Settings, Mobile Service. Android: Settings, Connections or Network, SIM Manager). Your travel eSIM must show as active or enabled. Phones sometimes disable a line during software updates or after being restored from a backup.

Step 3: Check Data Roaming Is ON for the eSIM

This is the number one cause of no data on arrival. Travel eSIMs technically operate as roaming connections, so Data Roaming must be enabled on the travel eSIM line. It feels wrong if you have spent years being told to keep roaming off. For the travel eSIM, on is correct, and it does not cost you anything extra because the plan price already covers it.

Step 4: Check Which Line Is Handling Data

Confirm mobile data is assigned to the travel eSIM, not your home SIM. If your home SIM is selected, your phone either roams expensively or, if you sensibly turned its roaming off, connects to nothing at all, which looks exactly like a dead eSIM.

Step 5: Are You Inside the Plan's Coverage?

A Spain plan does not work during your layover in Zurich. Regional plans have specific country lists, so a Europe plan may exclude a stopover country you assumed was included. Check your plan's exact list in your dashboard or on the global network coverage checker.

Step 6: Select the Network Manually

If the eSIM shows no service, turn off automatic network selection (iPhone: Settings, Mobile Service, tap the eSIM line, Network Selection. Android: in the eSIM's settings under Mobile Networks) and pick a partner network from the list by hand. Your plan's partner networks are listed on your plan page. If the first one refuses to connect, try the next.

Step 7: Restart the Phone

A full power off and on clears radio glitches that aeroplane mode does not. Thirty seconds, and it fixes more connection issues than anyone likes to admit.

Step 8: Check the APN

Most eSIMs configure their Access Point Name automatically, but if you have signal and no internet, the APN is the usual suspect. Find the correct APN value in your installation email or dashboard, then enter it under the eSIM's mobile data network settings. Leave username and password blank unless told otherwise.

Step 9: Has the Plan Started, Ended or Run Out?

• Check your data balance and expiry in the dashboard
• Validity windows start at first connection in the destination, so a 7-day plan used across a 10-day trip ends early by design
• If you have simply run out, top up the same eSIM online in a couple of clicks, with no reinstall needed

What NOT to Do

• Do not delete the eSIM. Deleting removes the profile from your phone entirely. No troubleshooting step ever requires deleting an active eSIM.
• Do not reset network settings as a first resort. It wipes saved WiFi passwords and rarely fixes what the steps above do not.
• Do not buy a second plan assuming the first is broken. Nine times out of ten it is a toggle, not the eSIM.

Still Stuck? What to Send Support

If you have worked through everything above, contact us via the support page and include three things: your order number, your phone model, and what the status bar shows (no service, bars without data, or an error message). With those three details support can usually resolve the issue in one reply instead of four.

Final Thoughts

Almost every eSIM that seems dead on arrival is one toggle away from working: roaming on for the eSIM, data assigned to the eSIM, correct network selected. Save this checklist before your next trip, and if you are still choosing a plan, start at the SimplySim destinations page.