eSIM Not Working Abroad? Here's What to Check, in Order
You landed, you switched your phone out of Wi-Fi, and nothing loads. Before you assume the eSIM is broken: it almost never is. The install worked, the plan is sitting there, and one setting on your phone is pointing the wrong way. This is the checklist, in the order that fixes the most problems fastest.
First, work out which kind of problem you have
“eSIM not working” covers three quite different situations, and the fixes don't overlap. Sort yours before you start poking at settings.
No service or no data after landing: the four-setting checklist
| Check | What it should say | Where it hides |
|---|---|---|
| Line on | The eSIM is switched on / "Turn on this line" | iPhone: Settings, Cellular. Android: Settings, Network & internet, SIMs. |
| Data line | Mobile data uses the travel eSIM | iPhone: Cellular, Cellular Data. Android: SIMs, Mobile data. |
| Data roaming | On, for the travel eSIM only | Inside the eSIM's own settings page, under its name. |
| Fresh registration | Airplane mode on for 10 seconds, then off | Control Centre or the quick-settings pull-down. |
The roaming one catches people out because it feels wrong. You spent the last week reading warnings about roaming charges, and now a guide tells you to turn it on. The distinction is which line: a travel eSIM reaches the local network as a visitor, so your phone counts it as roaming and the toggle has to be on for that line. On your home line, leave it off. That pairing is the same one described in the keep your number abroad guide.
After the airplane-mode toggle, give it a minute. Registration on a new network can take 30 to 60 seconds, occasionally longer right after a flight when the phone is also juggling a dozen other things. If the signal indicator shows a network name that isn't your home carrier, you're registered and it's only a matter of data starting.
Siima plans start their clock the first time you use mobile data with the eSIM active, not when you buy or install. So having the eSIM installed and sitting idle at home costs you nothing, and the first real connection abroad is what kicks things off. That first connection can take a moment.
If the four checks are all fine
Still nothing? Go down this list. Each one takes under a minute.
Install errors: QR codes, “Add eSIM” and locked phones
If nothing has installed yet, the fault is one of a short list. You need an internet connection to download the profile, so Wi-Fi or your existing mobile data has to be working. A QR code that has been scanned once usually won't work a second time, because an eSIM profile is meant to be downloaded a single time. If the camera-scan route fails on the first try, use manual entry with the SM-DP+ address and activation code from your confirmation email; the install guide shows each path.
If there's no “Add eSIM” option at all, either the phone doesn't support eSIM, or it's carrier-locked and rejecting profiles from other providers. Check the compatible devices list, then ask your home carrier whether the phone is unlocked. Most will unlock after the contract period ends, or on request. Do this before you fly, because unlocking from abroad is a pain.
It's the most tempting fix and the one most likely to leave you worse off. A deleted eSIM usually can't be re-downloaded from the same QR code. If something seems off, turn the line off and on, or restart the phone, and leave the profile in place. If it is already deleted, contact support with your order number rather than buying a duplicate plan.
Connected but slow, or some apps won't load
Speed complaints are usually one of three things, and only one of them is about the eSIM. First, your location: a phone in a basement, a metro tunnel or a valley will be slow on any SIM. Test it standing outside. Second, the plan itself. Some plans, including unlimited ones, slow down after a daily or total high-speed allowance is used up; that's how they're priced, not a fault. Check the plan details in your order. Third, an app problem: if a specific app fails while browsing works, it can be that app running its own region checks or blocking a VPN-like connection, and closing and reopening it usually clears it.
If you're seeing fast speeds on a first day and slow ones on the second, look at your data balance before anything else. The data usage calculator shows what maps, video calls and streaming really eat, which is often the answer: two hours of video calls is a lot of gigabytes.
When to contact support (and what to send)
If you've gone through the four checks, restarted, tried manual network selection and tested with Wi-Fi off, and there is still nothing, it's worth writing to us. Email [email protected] with four things: your order number, the country and city you're in, the phone model, and a screenshot of the eSIM's settings page showing the line status and roaming toggle. That set of details lets us skip the usual back and forth and go straight to checking the plan status.
On refunds: if you haven't installed the eSIM yet, you can request one from your Order History page within 30 days of purchase. Once an eSIM is installed, refunds aren't available, so if something fails before you install it, contact support first instead of retrying repeatedly.