Last updated March 2026

eSIM Troubleshooting — Fix Common Problems

1. eSIM won’t install / QR code error

Symptoms: Error when scanning QR code, “Unable to activate eSIM”, or “This code is no longer valid.”

iPhone fix:

  1. Make sure you’re connected to Wi-Fi — eSIM profiles can’t download on mobile data alone
  2. Go to Settings → General → About and install any carrier updates if prompted
  3. Restart your phone and try scanning again
  4. If scanning still fails, use the activation code (LPA string) from your dashboard — go to Settings → Cellular → Add eSIM → Enter Details Manually

Android fix:

  1. Confirm you have a Wi-Fi connection
  2. Clear the cache of SIM Manager or Carrier Services app (Settings → Apps → find the app → Clear Cache)
  3. Restart your phone and try again
  4. Use the activation code for manual entry: Settings → Network & Internet → SIMs → Add SIM → Enter code manually

Still not working? Make sure your phone is eSIM compatible and carrier-unlocked. Locked phones will reject third-party eSIM profiles.

2. “No Service” after installation

Symptoms: eSIM installed successfully but shows “No Service” or no signal bars.

Fix for both platforms:

  1. Toggle Airplane Mode on, wait 10 seconds, toggle off
  2. Check that the eSIM line is enabled (iPhone: Settings → Cellular → tap the eSIM line → Turn On This Line; Android: Settings → Network & Internet → SIMs → enable the eSIM)
  3. Make sure Data Roaming is turned on for the eSIM line (see Problem 3)
  4. Manually select a network: Settings → Cellular → Network Selection (iPhone) or Settings → Network & Internet → SIMs → [eSIM] → Network operators (Android) — choose “Automatic”

3. Data not working (data roaming is off)

This is the most common issue. Travel eSIMs use roaming to connect to local networks, so Data Roaming must be enabled.

iPhone:

  1. Go to Settings → Cellular
  2. Tap your travel eSIM line
  3. Toggle Data Roaming to on

Android (Samsung):

  1. Go to Settings → Connections → Mobile networks
  2. Select your eSIM
  3. Toggle Data roaming to on

Android (Pixel):

  1. Go to Settings → Network & Internet → SIMs
  2. Tap your eSIM
  3. Toggle Roaming to on

4. Wrong default data line

Symptoms: You’re connected but data is being consumed from your home SIM instead of the travel eSIM.

iPhone:

  1. Go to Settings → Cellular → Default Line
  2. For Cellular Data, select your travel eSIM
  3. Turn off Allow Cellular Data Switching to prevent fallback to your home SIM

Android:

  1. Go to Settings → Network & Internet → SIMs (or Connections → SIM card manager)
  2. Under Preferred SIM for mobile data, select your travel eSIM

5. Slow data speeds

Possible causes and fixes:

  1. Network congestion — speeds vary by location and time of day, especially in crowded areas
  2. Wrong network selected — go to network selection and set it to Automatic, or manually try a different carrier
  3. Background apps — close apps syncing large files (cloud backups, photo uploads)
  4. Plan speed tier — some economy plans are limited to 3G speeds; check your plan details
  5. Toggle airplane mode off and on to force a fresh network connection

6. eSIM disappeared from settings

Symptoms: The eSIM line is no longer visible in your phone’s SIM settings.

Possible causes:

  • A software update may have disabled the profile
  • The eSIM was accidentally deleted

Fix:

  1. Go to Settings → Cellular (iPhone) or Settings → Network & Internet → SIMs (Android)
  2. Look for a disabled profile — it may be toggled off rather than deleted
  3. If the profile is truly gone, you’ll need to reinstall it. Go to your dashboard and scan the QR code again, or use the activation code

Note: Some eSIM profiles can only be installed once. If reinstallation fails, contact support@e-sim.onl for a replacement.

7. Can’t scan QR code

Symptoms: Camera won’t focus, QR code doesn’t register, or scanning from the same phone.

Fixes:

  1. Increase screen brightness on the device displaying the QR code
  2. Hold steady at about 15–20 cm distance
  3. Avoid glare on the screen showing the code
  4. If scanning from the same phone that needs the eSIM, you can’t point the camera at itself — use the activation code instead. Find it in your dashboard below the QR code, and enter it manually in Settings

8. Plan expired unexpectedly

Symptoms: Data stopped working before you expected.

Check these:

  1. Validity starts at first data use — not at purchase. If you activated the eSIM earlier than planned, the countdown already started
  2. Data allowance exhausted — you may have used all data before the validity period ended. Check your dashboard for the usage bar
  3. Time zone differences — validity is typically calculated in UTC, which may differ from your local time

If your plan shows as Expired or Data Used Up, you can top up (if supported) or purchase a new plan.

9. Usage not updating in the dashboard

Symptoms: Dashboard shows old usage data that doesn’t match your actual consumption.

This is expected. Usage data is synced from the network provider and can be up to 1 hour behind your actual usage. The sync happens via provider webhooks and an hourly background process.

What to do:

  • Refresh the dashboard page — it may have updated since you last loaded it
  • Wait up to an hour for the next sync cycle
  • Don’t rely on the dashboard for exact real-time tracking, especially when you’re close to your data limit
  • You’ll receive email alerts at 75% and 100% usage regardless of dashboard delays

10. When to contact support

Contact support@e-sim.onl if:

  • Your order is stuck in Pending or Processing for more than 15 minutes
  • Your order status is Failed
  • You’ve tried all the troubleshooting steps above and data still isn’t working
  • You need a replacement QR code because reinstallation failed
  • Your eSIM shows Suspended status
  • You were charged but didn’t receive a QR code

Include your order number and device model in your email to speed up the resolution.