eSIM Not Working? How to Fix "No Service" and "No SIM" Errors

Your eSIM shows as installed, but your phone says "No Service" or "No SIM" anyway — this is the single most common travel eSIM problem, and it's almost always one of a handful of settings, not a broken eSIM. Here's the fix list in the order most likely to work.

Key Takeaways

- The most common fix by far: turn on Data Roaming for the travel eSIM specifically — without it, an installed and active eSIM still won't connect (Apple Support, 2026).

- "No Service" after installing an eSIM doesn't usually mean the eSIM failed — it means the phone hasn't registered on a local network yet, which a restart or manual network selection often fixes (Apple Support, 2026).

- Resetting network settings is safe to try as a last resort — it does not delete your installed eSIM.

Why does my phone say "No Service" or "No SIM" after installing an eSIM?

This almost never means the eSIM itself is broken. It usually means one of three things: Data Roaming isn't turned on for that line, the eSIM isn't selected as your active data line, or your phone hasn't finished registering on a local partner network yet. All three are settings issues, fixable in a couple of minutes, not a sign you need a new eSIM (Apple Support, 2026).

Fix 1: Turn on Data Roaming for the travel eSIM

This is the fix that resolves the problem more often than anything else. Go to Settings > Cellular, tap your travel eSIM line, and turn Data Roaming on. It sounds backwards — "roaming" usually means extra charges — but for a travel eSIM, roaming is exactly how it reaches its local partner network, and it's already included in what you paid (Apple Support, 2026).

Fix 2: Confirm the eSIM is set as your data line, and the line is turned on

Still in Settings > Cellular, check that Cellular Data is set to your travel eSIM, not your home line. Then tap the eSIM line itself and confirm Turn On This Line is toggled on — it's easy to have a fully installed, fully paid-for eSIM sitting there simply switched off.

Fix 3: Restart your phone, then toggle Airplane Mode

A full restart (power off, wait 30 seconds, power back on) forces your phone to re-register on the network from scratch. If that doesn't help, toggle Airplane Mode on for 30 seconds and back off — this has the same re-registration effect without a full reboot.

Fix 4: Manually pick a network instead of automatic

Go to Settings > Cellular, select your eSIM line, then Network Selection, and turn Automatic off. Wait for the list of available networks to load, then pick one manually. Travel eSIMs typically have more than one partner network in each country — if the one your phone picked automatically has a weak local signal, a different partner network on the list might not.

Fix 5: Update iOS and check for a carrier settings update

Go to Settings > General > Software Update to confirm you're on the latest iOS. Separately, carriers occasionally push a small carrier settings update that isn't the same as an iOS update — you'll get a prompt automatically if one's available, usually within a minute of connecting to Wi-Fi or cellular data.

Fix 6: Reset network settings (last resort, but safe)

If nothing above works, go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. This clears saved Wi-Fi passwords and cellular configuration, forcing everything to reconnect from scratch — but it does not delete your installed eSIM, so it's safe to try before contacting support.

Frequently asked questions

Does resetting network settings delete my eSIM?

No. It resets Wi-Fi passwords, VPN settings and cellular configuration, but your installed eSIM profiles stay in place — you won't need to reinstall or re-scan a QR code afterward.

Why do I need Data Roaming on for an eSIM I already paid for?

Because the eSIM connects through a local partner network in whatever country you're in, and your phone classifies any non-home network as "roaming" regardless of whether it costs extra. For a travel eSIM, that connection is already included — the roaming toggle is just how the phone lets it happen.

I've tried everything and it still shows "No Service" — what now?

Confirm you've actually arrived in a country the plan covers, since most travel eSIMs only activate on-location. If you're covered and still stuck, contact your provider's support with your ICCID (see our IMEI, EID and ICCID guide for where to find it) — they can check whether the profile activated correctly on their end.

Is this different for Android phones?

The exact menu names differ, but the same checks apply: confirm data roaming is on for the eSIM line, confirm it's set as the active data SIM, restart the device, and try manual network selection under Settings > Network & internet > SIMs.

Sources

• Apple, If Dual SIM with eSIM isn't working on your iPhone, retrieved 2026-07-08, https://support.apple.com/en-us/109322
• Apple, If you see SOS, No Service, or Searching on your iPhone or iPad, retrieved 2026-07-08, https://support.apple.com/en-us/120000
• Apple, If you can't set up an eSIM on your iPhone, retrieved 2026-07-08, https://support.apple.com/en-us/102478