Common eSIM Problems and How to Fix Them: A Troubleshooting Guide

eSIM technology is incredibly reliable, but like any tech, it can run into issues — especially when you're in a new country with unfamiliar networks.

Here's a comprehensive eSIM troubleshooting guide covering the most common problems and their fixes.

Problem 1: eSIM Not Connecting / No Service

This is the most common issue travelers face. You land at your destination, turn on your eSIM, and… nothing.

Quick Fixes (Try in Order)

1. Toggle Airplane Mode — Turn Airplane Mode ON, wait 10 seconds, turn OFF. This forces your phone to re-register on the network.

2. Turn Data Roaming ON — This is the #1 cause of "no service." Go to:

   • iPhone: Settings → Cellular → your eSIM → toggle Data Roaming ON
   • Android: Settings → Connections → SIM Card Manager → your eSIM → toggle Data Roaming ON

3. Restart Your Phone — A classic for a reason. A full restart clears temporary network glitches.

4. Manually Select a Network — Sometimes automatic network selection fails:

   • iPhone: Settings → Cellular → Network Selection → turn OFF Automatic → pick a carrier from the list
   • Android: Settings → Connections → Mobile Networks → Network Operators → Search → select one
   • Try each available carrier until one works

If Still Not Working

• Check your APN settings: Some eSIMs require manual APN configuration. Your Roaming2 confirmation email includes the correct APN. Go to Settings → Cellular → Cellular Data Network → enter the APN details.
• Check signal strength: Are you underground or in a building with thick walls? Move near a window or go outside.
• Check device compatibility: Confirm your phone supports eSIM from this destination. Most modern phones do, but some regions have restrictions.

Problem 2: eSIM Installed But Showing "No SIM"

Your eSIM profile is installed, but your phone acts like there's no SIM at all.

Fixes

1. Check that the eSIM line is turned ON:

   • iPhone: Settings → Cellular → tap your eSIM → ensure it's enabled (not grayed out)
   • Android: Settings → Connections → SIM Card Manager → ensure your eSIM is toggled ON

2. Remove and re-add the eSIM: Delete the eSIM profile and re-install using the QR code from your Roaming2 email. Don't worry — your plan doesn't expire when you delete the profile. You just need to scan the QR code again.

Note: Deleting an eSIM profile does not cancel your plan. You can re-install at any time during your plan's validity period.

Problem 3: Very Slow Data Speeds

Your eSIM is connected, but data is crawling.

Causes and Fixes

Cause	Fix
You've hit your FUP limit	Check your remaining high-speed data in your Roaming2 account. If exhausted, purchase a top-up.
Congested network	Move to a different location. Airports and train stations are often overloaded.
Weak signal	Check signal bars. Move near a window or go outside.
Phone stuck on 3G/4G	Force 5G/4G: iPhone → Settings → Cellular → Voice & Data → select 5G Auto or 4G. Android → Settings → Connections → Mobile Networks → Network Mode.
Roaming partner issue	Manually select a different network operator (see Problem 1 fix #4).

How to Test Your Actual Speed

Run a speed test (Ookla Speedtest or Fast.com) to get real numbers. Compare to what your plan advertises:

• Full speed (4G/5G): 20–200 Mbps
• After FUP: 1 Mbps (enough for messaging, maps, light browsing)

Problem 4: QR Code Won't Scan

Fixes

1. Clean your camera lens — smudges can prevent scanning
2. Increase screen brightness on the device displaying the QR code
3. Try the manual installation link — your Roaming2 email includes an alternative installation link/URL
4. Increase the distance — hold your phone 6–8 inches away
5. Save the QR code as an image and zoom in if needed

Still stuck? Roaming2 support can send you a new QR code or installation link. Contact us 24/7.

Problem 5: eSIM Works on Phone But Can't Use Hotspot

Possible Causes

• Plan doesn't include hotspot: Roaming2 plans all include hotspot sharing. If you're using another provider, check their tethering policy.
• Phone settings: Check that Personal Hotspot / Mobile Hotspot is enabled in settings.
• Carrier restriction: Some carriers detect and block tethering. Try:
  1. Switching to USB tethering
  2. Using a VPN on your phone
  3. Contacting Roaming2 support for assistance

Problem 6: "Cellular Plan Cannot Be Added" Error

Fixes

1. Update your phone's carrier settings:

   • iPhone: Settings → General → About → if an update is available, a prompt will appear
   • Android: Settings → System → System Update → check for updates

2. Update iOS/Android to the latest version

3. Reset network settings:

   • iPhone: Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings (this clears all saved Wi-Fi passwords, so note them first)
   • Android: Settings → General Management → Reset → Reset Mobile Network Settings

4. Try installing the eSIM on a different device to rule out phone-specific issues

Problem 7: Data Working but Can't Make Calls

This is expected behavior for data-only eSIMs — which is what most travel eSIMs are. Roaming2 eSIMs are primarily data plans, not phone number plans.

If you need voice calling:

• Use VOIP apps like WhatsApp, Skype, or Telegram for calls
• Keep your home SIM active for traditional calls
• Your eSIM provides the data connection for VOIP calls

When to Contact Support

Try the quick fixes above first — they solve 90%+ of issues. Contact Roaming2 support if:

• You've tried all the above and still have no service
• Your eSIM was accidentally deleted and you need a new QR code
• You believe there's a billing or plan issue
• You need help with a device not listed on our compatibility page

Roaming2 offers 24/7 support for all customers.

Prevention: Set Up Before You Travel

Most eSIM problems happen because travelers try to install or activate for the first time in a stressful situation (just landed, tired, no Wi-Fi).

Best practice: Install your Roaming2 eSIM at home, over your home Wi-Fi, at least a day before you fly. Confirm the profile is added. Then when you land, it's just a toggle away.

Install your Roaming2 eSIM now →

Most eSIM issues have simple fixes. Bookmark this guide, and you'll never be stuck offline for long.