eSIM activation troubleshooting: installed, but no connection
You scanned the QR code, the profile installed, you landed… and nothing. Deep breath: this almost never means the eSIM is dead. Across providers' own help pages, the same handful of causes account for nearly every "my eSIM doesn't work" case, and the fixes are 30 seconds each. This page walks them in the order that finds the fault fastest — the order the providers themselves use.
The fast answer (the big three)
Before anything else, check these three — they fix most cases: (1) the eSIM's toggle is on; (2) the eSIM is selected as the line for cellular/mobile data; (3) Data Roaming is enabled for the eSIM line — yes, even on travel eSIMs; the roaming flag is how the phone is allowed onto the foreign network. Airalo's troubleshooting page lists exactly these three; Sim Local's guide walks the same steps with the exact menus.
Check 1: is the profile actually installed and on?
Look for the eSIM in Settings: iPhone — Settings > Cellular, the eSIM appears under SIMs with whatever label you gave it; Pixel — Settings > Network & internet > SIMs; Samsung — Settings > Connections > SIM manager. If it's there, make sure its switch is on. If it's not there, the install didn't complete — redo it from the provider's app or QR page (on stable Wi-Fi), and give the profile a recognizable label so you never confuse it with your home SIM (Airalo's guide specifically recommends labeling).
Check 2: which line carries data?
On a dual-SIM phone, your home SIM can silently remain the data line — the eSIM shows connected while your pocket data still routes (expensively) through home. iPhone: Settings > Cellular > Mobile/Cellular Data → select the eSIM. Sim Local's iOS steps also tell you to turn Allow Cellular Data Switching off so the phone can't drift back to your primary SIM mid-trip. Android equivalents live under the SIMs menu ("Mobile data" / "Preferred SIM for data").
Check 3: Data Roaming — the classic
Travel eSIMs connect to foreign networks, and phones refuse foreign networks unless Data Roaming is on — for the eSIM line specifically. It feels wrong ("roaming = fees!") but it's how the plumbing works: your home SIM can't be charged for the eSIM's roaming, they're separate lines. Saily's activation guide makes "Enable Data Roaming for the Saily eSIM profile" a pre-departure step; Sim Local's third step is the same toggle. If you take one thing from this page: roaming ON for the eSIM, data line = eSIM, home SIM's data off.
Check 4: are you in the coverage area (yet)?
A Japan-only eSIM will not connect in your living room, and that's by design: Airalo's help center states most eSIMs "activate when the installed eSIM connects to the supported network at the destination," and its troubleshooting page leads with the coverage-area rule — an eSIM for France only works in France (source). So "no service" before departure is often normal. Related: if you bought weeks early, check the activation window — Nomad, for instance, auto-activates unused eSIMs on day 60 after purchase, and the validity clock runs from activation, not arrival (source).
Check 5: APN and the patient fix
If everything above is right and you still have no data, check the APN (Access Point Name) for the eSIM line — the provider's app usually installs it, but profiles can land half-configured. Saily's guidance: if the APN is missing on Android, open the Saily app and keep it open up to five minutes for automatic configuration; on iOS with a missing APN, contact support for manual values (source). Also allow a few minutes after landing — first registration on a foreign network is occasionally slow, and a restart (not airplane-mode toggle, a real restart) clears stuck modem states.
Still nothing? Escalate with evidence
- Contact the provider's own support — Saily runs in-app live chat, Sim Local offers 24/7 WhatsApp, Holafly advertises 24/7 chat, Airalo has chat plus email. Airalo's refund process may even ask for screenshots of your device settings, so take them first.
- Mention: your phone model, that the profile is installed, that data line + roaming are set, where you are, and what the signal indicator shows.
- If the plan is genuinely faulty, every provider we cover has a refund path — verified windows: Airalo fault-claims within 30 days (terms), Saily 30 days unactivated + quality-issue cases (policy), Nomad 30 days from purchase (policy), Holafly up to 6 months unactivated (policy), Sim Local 14 days unactivated, tech-issue cases even outside the window (policy).
Two mistakes that make it worse
- Deleting and re-scanning the profile immediately. Some eSIMs are single-use QR codes — deleting a profile can consume it. Exhaust the five checks and support first (Saily documents eSIM transfer/reinstall as its own careful process for exactly this reason).
- Leaving "cellular data switching" on (iPhone). The phone quietly moves data back to your home SIM and the bill follows. Sim Local's setup steps say to switch it off.
Buying with support in mind
If you're still choosing a provider and value fast help when things break, weigh support channels as a criterion — it's Criterion 7 in our framework. These links support the site: