Why is my eSIM not working? The 8 fixes, in order

You land, you switch the travel line on, and nothing. No bars, or bars but no data. Before you panic-buy airport Wi-Fi, run this list in order. It is sorted from most likely and fastest to least likely and most annoying.

1. Airplane mode off and on (10 seconds)

This fixes more eSIM problems than everything else on this list combined. Airplane mode forces the phone to renegotiate with the local network from scratch. Flip it on, count to five, flip it off.

2. Check data roaming is ON for the travel line (30 seconds)

The single most common real cause. A travel eSIM technically roams on the local network, so the line needs data roaming enabled. People switch it off out of habit because roaming means horror bills on a home SIM. On the travel line it is normal and does not cost extra. Settings, your travel line, Data Roaming: on.

3. Check which line is actually doing data (30 seconds)

Your phone can have both lines on but be pointing mobile data at your home SIM. Settings, Mobile Data (or SIM manager on Android), and make sure the travel eSIM is selected for data. Your home line can stay on for texts, just not for data.

4. Select the network manually (2 minutes)

Sometimes the phone parks itself on a partner network the plan does not include. Go to network selection, switch off automatic, and pick the network your plan uses. Every plan table on my destination pages shows the network each plan runs on, exactly for this moment.

5. Check the APN (5 minutes)

If you have bars and no data, the APN (access point name) may not have configured itself. Your provider’s install email lists the APN value. Settings, your travel line, Mobile Data Network, and type it in exactly. This is rare on iPhone and more common on Android.

6. Confirm the plan actually started

Check the provider’s app or your email. Two possibilities: the plan has not activated yet (some start on first network connection, some on a fixed date you chose), or it activated earlier than you thought and the validity ran out. Validity almost always counts from activation, not from purchase; my install timing guide covers how to never lose a day.

7. Restart the phone

Old advice because it works. A full restart clears modem state that airplane mode sometimes does not.

8. Worst case: reinstall, but read this first

Deleting and rescanning the QR code fixes truly broken installs, but most providers issue single-use QR codes. Deleting the eSIM can burn it permanently. Contact the provider’s support first and ask for a reinstall or a fresh code; do not delete on your own initiative unless support tells you to.

The 30-second pre-flight check that avoids all of this

Install the eSIM at home over Wi-Fi, label the line, set data roaming on for it, set your home line’s roaming off, and confirm the plan’s start condition. Nine problems out of ten on this list are really a setup step that got skipped at home. The full setup walkthrough takes two minutes.

If none of the eight worked, the plan itself is probably the problem, not your phone. Message the provider’s support with your order number and a screenshot of your network settings; decent stores respond within the hour.