How to Fix eSIM Activation Errors — Full Practical Guide

eSIM technology has made mobile connectivity easier than ever — no more plastic SIM cards, no more queues in mobile stores, no more expensive roaming packages. But even though eSIMs are simple in theory, activation doesn’t always go smoothly.

If your eSIM refuses to activate, gets stuck on “Processing…”, won’t download, or your phone simply doesn’t recognize it — don’t panic. Almost every eSIM error has a logical cause and a quick solution.

In this full guide, I’ll walk you through every common eSIM activation problem, explain what causes it, and show you how to fix it step-by-step. I also added a bit of my own experience, because yes — I’ve been through these headaches myself while traveling.

What Causes eSIM Activation Errors?

In 90% of cases, eSIM problems come from:

• network issues

• device incompatibility

• outdated software

• incorrect installation steps

• trying to activate an eSIM too early (before travel)

• using a VPN

• switching devices during activation

• low signal or unstable Wi-Fi

Understanding these reasons helps you solve the problem much faster.

1. Make Sure Your Phone Supports eSIM

This is the №1 reason travelers get stuck.

Even though most modern devices support eSIM, not all versions of the same model do.

✔ iPhones bought in the USA support eSIM only

✔ iPhones from some Asian regions don’t support eSIM at all

✔ Samsung/Google Pixel support only certain carriers

How to check:Go to: Settings → About Phone → Check for “EID”If your device has an EID, it supports eSIM.

If there is no EID → you cannot install an eSIM.

2. Update Your Device to the Latest iOS/Android

You’d be surprised how often outdated software stops the eSIM activation process.

Do this before anything else:iOS: Settings → General → Software UpdateAndroid: Settings → System → Update

Even a small patch can fix carrier compatibility issues.

3. Restart Your Device Before Scanning the QR Code

This is a simple trick but works incredibly well.

I personally had an issue in Turkey where the eSIM refused to install — until I restarted my iPhone. After rebooting, the QR code scanned instantly.

Sometimes the system has cached network information. A restart clears it.

4. Use a Strong, Stable Internet Connection

eSIMs require:

• Wi-Fi

• or mobile data from another SIM

⚠ Public Wi-Fi in airports or cafés often blocks eSIM activation.

If the QR code doesn’t load or the eSIM gets stuck at 99%, try:

• hotspot from another device

• private home Wi-Fi

• switching off VPN or AdBlock

5. Turn Off VPN and AdBlock

VPN is the hidden enemy of eSIM activation.

It blocks:

• eSIM profile download

• traffic to the carrier

• activation codes

Make sure VPN is off for both:

✔ Wi-Fi settings

✔ Browser extensions

Same goes for AdBlock — disable it temporarily.

6. Remove Old or Unused eSIM Profiles

Your phone has limited storage for eSIM profiles.

If you’ve installed many eSIMs before, delete the ones you no longer use:

iOS:Settings → Cellular → eSIMs → Delete eSIM

Android:Settings → Network → SIM Manager → Remove SIM

This frees space for the new eSIM.

7. Make Sure You Are Not Activating the eSIM Too Early

Some travel eSIMs activate immediately after installation, not when the data connection starts.

This means if you're traveling next week, but you activate the eSIM today — it may expire before your flight.

Tip:Most providers recommend installing the eSIM only when you land.

8. For “Data Not Working” Errors — Check APN Settings

Sometimes the eSIM installs correctly, but mobile data doesn’t work.

This usually means APN (Access Point Name) wasn’t added automatically.

Your eSIM provider gives you APN details (usually in your account).Add them manually:

iOS:Settings → Cellular → Your eSIM → Cellular Data Network

Android:Settings → Network → SIMs → Access Point Names

Once you enter the APN, restart the phone.

9. For iPhone: Reset Network Settings

This fixes:

• “Could Not Activate Cellular Plan”

• “Activation Failed”

• “Unable to Complete Cellular Update”

• 
  

Go to:Settings → General → Transfer/Reset → Reset → Reset Network Settings

This removes old network conflicts without deleting your content.

10. For Samsung/Android: Enable “Download SIM via QR Code” Manually

Sometimes Android doesn’t automatically open the QR scanning tool.

Do this manually:Settings → Connections → SIM Manager → Add eSIM → Scan QR Code

11. Try Manual eSIM Setup (Without QR Code)

If the QR code fails, you can always enter details manually.

Most providers offer:

• activation code

• SM-DP+ address

• confirmation code

Add them manually in:iOS → Add eSIM → Use Activation CodeAndroid → Add eSIM → Enter Code

12. Contact the eSIM Provider for a Fresh QR Code

If your QR code was already used once, you might need a new one.

Good providers (like Airalo, Nomad, Holafly) issue a fresh code in minutes.

Many eSIM errors disappear simply by installing a newly generated code.

13. My Personal Experience — What Actually Works

While traveling through several countries in one month, I had three different eSIM activation issues:

1. In Spain — eSIM installed but mobile data didn’t start.Solution: adding APN manually.

2. In Georgia — QR code didn’t load at all.Solution: switched from café Wi-Fi to mobile hotspot.

3. In Turkey — activation stuck at 80%.Solution: rebooted my iPhone and it worked instantly.

The point is: eSIM issues are normal, but they always have a solution.

FAQ — Quick Answers

Why won’t my eSIM activate?

Usually due to weak Wi-Fi, VPN, device incompatibility, or outdated software.

Can I reuse the same eSIM QR code?

Usually no — many codes are single-use. Request a new one.

Why does my eSIM have no signal?

Check APN, enable roaming, restart the phone, or move to an area with better coverage.

How long does activation take?

From a few seconds to 5 minutes. Anything longer indicates an error.

Should I install the eSIM before or after traveling?

After landing — to avoid early activation issues.