Troubleshooting - TellusSIM eSIM Not Working?

⚡ 2-Minute Quick Fix (Solves 80% of Issues)

Follow these steps IN ORDER:

Settings → Cellular → TellusSIM → Toggle ON
Cellular → Cellular Data → Select "TellusSIM"
Back → TellusSIM → Data Roaming → Turn ON
Back → Your Primary SIM → Turn OFF "Cellular Data"
Toggle Airplane Mode ON, wait 10 seconds, then OFF
Wait 60 seconds and try opening a website

✅ Working now? Great! Remember to keep TellusSIM as your data line and keep roaming ON.

🔍 Still Not Working? Check These:

Before You Do Anything Else:

✅ Is your phone carrier-unlocked? (Locked phones CAN'T use eSIMs from other providers)
✅ Are you in the country you bought the plan for?
✅ Is the eSIM installed? (Settings → Cellular → You should see TellusSIM listed)
✅ Has it been more than 24 hours since purchase? (Plans may expire)

📱 Step-by-Step Troubleshooting

Step 1: Verify eSIM is Enabled

iPhone: Settings → Cellular → TellusSIM → Make sure toggle is GREEN

Android: Settings → Network & Internet → SIMs → TellusSIM → Make sure it's ON

Step 2: Set as Default Data Line

iPhone: Settings → Cellular → Cellular Data → Select "TellusSIM"

Android: Settings → Network & Internet → Mobile Network → Select TellusSIM

Step 3: Enable Data Roaming

iPhone: Settings → Cellular → TellusSIM → Data Roaming → ON (green)

Android: Settings → Network & Internet → SIMs → TellusSIM → Roaming → ON

Step 4: Disable Primary SIM Data

iPhone: Settings → Cellular → [Your Primary SIM] → Turn OFF "Cellular Data"

Android: Settings → Network & Internet → SIMs → [Your Primary SIM] → Turn OFF

Step 5: Force Network Reconnection

1. Turn Airplane Mode ON

2. Wait 10 seconds

3. Turn Airplane Mode OFF

4. Wait 60 seconds for network to connect

🌐 Advanced: Manual Network Selection

If automatic network selection isn't working, force your phone to choose a specific network:

iPhone:

Settings → Cellular → Network Selection
Turn OFF "Automatic"
Wait for networks to scan (may take 30-60 seconds)
Select ANY network from the list (try the first one)
Wait 30 seconds and test

Android:

Settings → Network & Internet → Mobile Network
Tap "Choose network automatically" to turn it OFF
Select a network from the list
Wait 30 seconds and test

⚠️ Common Mistakes

Phone is carrier-locked: Contact your carrier to unlock it. eSIMs won't work on locked phones.
Primary SIM still using data: You MUST disable cellular data on your home SIM.
Roaming is OFF: Data Roaming must be ON for the TellusSIM line (don't worry, you won't get charges).
Wrong country: If you bought a Thailand plan but you're in Vietnam, it won't work.
eSIM not installed: You must install the eSIM BEFORE it can work. Check if you see it in Cellular settings.

🔋 Device-Specific Issues

iPhone Issues:

iPhone XS/XR: Make sure iOS is updated to latest version
Dual SIM not appearing: Restart phone after installing eSIM
"Cellular Plan Ready to be Installed": Delete and reinstall the eSIM

Android Issues:

Samsung: Some carrier-specific models don't support eSIM even if the model name matches
Google Pixel: Make sure "Automatically select network" is OFF if having issues
Generic Android: Try Settings → Reset → Reset Network Settings (won't delete data)

🌍 Country-Specific Issues

Middle East (Saudi Arabia, UAE, Yemen):

Network registration can take 2-5 minutes longer than other regions
Try manual network selection if automatic doesn't work within 3 minutes
Some areas have limited coverage - try moving to a different location

Asia (Thailand, Vietnam, Indonesia):

Make sure your device supports the local LTE bands
Airport networks can be congested - try again when you leave the airport

✅ Still Having Issues?

Email us: esimguide@gmail.com

Include:

Your order number
Device model (e.g., "iPhone 14 Pro", "Samsung Galaxy S23")
Country you're trying to use it in
Screenshot of Settings → Cellular (show all SIM cards and their settings)
Have you followed ALL steps above? (Please confirm)

Response time: 2-4 hours average, often faster

💡 Prevention Tips for Next Time

Install BEFORE you travel: Don't wait until you land - install at home with good Wi-Fi
Test at home: After installing, go to Settings → Cellular and verify you see the eSIM
Screenshot your settings: Take photos of working cellular settings so you can reference them
Check carrier lock status: Call your carrier BEFORE traveling to confirm your phone is unlocked
Save this page: Bookmark this troubleshooting guide for offline access

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🆘 eSIM Not Working?