eSIM Troubleshooting Guide

Your eSIM isn't cooperating. Most problems have quick fixes – let's work through them together.

Universal First Steps

Before diving into specific issues, try these steps. They fix about 80% of eSIM problems:

1. Restart your phone – Turn it completely off, wait 30 seconds, turn it on. This works more often than you'd expect.
2. Toggle Airplane Mode – Turn it on, wait 10 seconds, turn it off. This forces your phone to reconnect to networks.
3. Check Data Roaming – This is the most common issue abroad. Make sure it's ON for your Simcardo eSIM.

Still having issues? Find your problem below.

No Signal / "No Service"

eSIM is installed but shows no signal in your destination. Here's how to fix it:

Step 1: Enable Data Roaming

iPhone: Settings → Cellular → [Your Simcardo eSIM] → Data Roaming → ON

Android: Settings → Connections/Network → [Your Simcardo eSIM] → Data Roaming → ON

Step 2: Make Sure eSIM is Active

If you have multiple SIMs, your phone might be using the wrong one for data.

iPhone: Settings → Cellular → Cellular Data → Select Simcardo

Android: Settings → SIM manager → Mobile data → Select Simcardo

Step 3: Try Manual Network Selection

Sometimes automatic network selection picks a network that doesn't work with your plan.

iPhone: Settings → Cellular → [Simcardo eSIM] → Network Selection → Turn off Automatic → Choose a different network

Android: Settings → Connections → Mobile networks → Network operators → Search networks → Select manually

Complete guide to manual network selection

Step 4: Check Coverage

Are you in an area with coverage? Rural or remote locations may have limited coverage. If you're unsure about coverage in your specific location, contact our support team.

Slow Internet Connection

Connected but painfully slow? Here's what to try:

1. Check data usage – Have you exhausted your data allowance? Check in your Simcardo account
2. Try a different network – Use manual network selection to switch to another available network
3. Disable VPN – VPNs can significantly slow down connections
4. Move to a different location – Building materials, basements, and crowds can affect signal
5. Reset network settings – Last resort but often effective (Settings → General → Reset → Reset Network Settings)

Detailed slow internet guide

Installation Problems

"This code is no longer valid"

Each QR code can only be used once. If you see this error:

• The eSIM is already installed – check Settings → Cellular (you may just need to enable it)
• Someone else scanned your QR code – contact support for a replacement

More about this error

"Unable to complete cellular plan change"

This usually means a temporary network issue:

1. Make sure you have stable WiFi
2. Restart your phone
3. Try again in a few minutes
4. If using VPN, disconnect it

Complete fix guide

"Carrier cannot be added" (iPhone)

Usually means your iPhone is carrier-locked. Check if your phone is unlocked and contact your original carrier for unlocking.

eSIM Option Not Showing

If you can't find eSIM settings on your phone:

• Your phone model may not support eSIM – verify compatibility
• Your phone might be carrier-locked with eSIM disabled
• Try restarting your phone

Hotspot / Tethering Not Working

Want to share data from your eSIM with other devices? Most Simcardo plans support this, but you may need to:

1. Make sure Personal Hotspot is enabled for your Simcardo eSIM
2. Check if your plan supports tethering (most do)
3. Restart both your phone and the device you're connecting

Complete hotspot fix

eSIM Works Then Stops

It was working and suddenly stopped? Check:

1. Data balance – You may have used all your data. Check your account
2. Validity period – Has your plan expired? How validity works
3. Network settings reset – Re-enable data roaming and verify eSIM is selected for data
4. Software update – Phone updates sometimes change settings. Verify your eSIM configuration

Still Not Working?

If you've tried everything above and still have issues, we're here to help:

• Live Chat: Available on our contact page
• WhatsApp: +420 737 531 777
• Email: [email protected]

When contacting support, please have ready:

• Your phone model (e.g., iPhone 14 Pro, Samsung Galaxy S24)
• Order number or email used for purchase
• Screenshot of any error (if applicable)
• What you've already tried

We respond within hours during business hours (Mon–Fri, 9–18) and work to get you connected as quickly as possible.