Why Is My eSIM Not Working? 8 Causes & How to Fix It

Your eSIM isn't working because it wasn't fully activated by the carrier, the eSIM line isn't set as the active data line on your phone, or your APN settings are missing (common on Android). Most eSIM issues resolve in under 5 minutes once you know where to look.

8 Reasons Your eSIM Isn't Working in 2026

eSIM setup involves three moving parts: your device, the carrier's provisioning system, and your phone's cellular settings. A failure in any one of them produces the same symptom — no service — but the fix is completely different depending on which part broke.

The Carrier Hasn't Finished Provisioning

After you scan the QR code and your phone shows the eSIM as installed, the carrier still needs to activate your line on their network — a process that can take anywhere from a few minutes to 24 hours. This is the most common cause of a freshly installed eSIM showing "No Service."

Fix: Wait. If it's been less than 24 hours, restart your phone and check again. If 24 hours have passed without activation, contact your carrier's support line with your order number.

The eSIM Line Isn't Set as Your Data Line

On dual-SIM phones, both a physical SIM and an eSIM can be installed simultaneously. But only one can handle data at a time. If your physical SIM is still designated as the data line, your eSIM will show a signal but data won't flow through it.

Fix:
- iPhone: Settings → Cellular → Cellular Data → select your eSIM line
- Android: Settings → Mobile Network → Preferred SIM for Data → select eSIM

APN Is Not Configured (Android)

iPhones download APN settings automatically when an eSIM is activated. Android does not — it requires manual entry. Without the correct Access Point Name, your phone registers to the carrier's voice network but can't route data.

Fix: Find your carrier's APN settings (usually in their app, website, or confirmation email) and enter them at Settings → Mobile Network → Access Point Names → Add. Required fields are typically Name, APN, and sometimes Username/Password.

The QR Code Was Already Used

Each eSIM QR code is single-use. Once scanned, it's invalidated by the carrier. If you factory-reset your phone, switched devices, or accidentally deleted the eSIM profile, the original QR code will fail when you try to re-scan it.

Fix: Contact your carrier and request a new QR code for the same plan. Most carriers can generate a replacement in their support portal within minutes.

Your Device Has Reached Its eSIM Storage Limit

iPhones can store up to 8 eSIM profiles, but older models (XS, XR) may have lower limits. Android limits vary by manufacturer. If your device is at its storage cap, attempting to add a new eSIM will fail silently or show an installation error.

Fix: Delete unused eSIM profiles at Settings → Cellular → [profile name] → Delete eSIM (iPhone) or Settings → Mobile Network → [profile] → Remove (Android).

A Software Update Reset Your Network Settings

iOS and Android updates occasionally reset cellular settings, particularly after major version upgrades. This can cause a previously working eSIM to show "No Service" after an update without any other change.

Fix: Go to Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings. On Android, use Settings → General Management → Reset → Reset Network Settings. Warning: this erases saved Wi-Fi passwords.

The Physical SIM and eSIM Are in Conflict

On some Android devices, having both a physical SIM and an eSIM active simultaneously causes data routing conflicts, especially if both SIMs are from different carriers with overlapping frequency bands. The phone may ping-pong between them and drop data.

Fix: Set one line as the exclusive data SIM in your cellular settings and disable data roaming on the other. If the conflict persists, temporarily remove the physical SIM to confirm the eSIM works in isolation.

Your Carrier Doesn't Support eSIM on Your Account Type

Prepaid plans, legacy accounts, and certain business accounts still have eSIM restrictions at some carriers even in 2026. If you're on a grandfathered plan, your account type may not have been migrated to eSIM-compatible billing.

Fix: Log in to your carrier account online and check whether your plan shows eSIM as an available feature. Upgrading to a current plan typically unlocks it immediately.

eSIM Troubleshooting Checklist (2026)

Also Read: Why Is My Call Going Straight to Voicemail? 9 Causes & Fixes

Airalo and Third-Party Travel eSIMs: Extra Steps

Travel eSIMs from providers like Airalo, Holafly, and Nomad are data-only plans. They don't provide a phone number, so calls and SMS route through your primary SIM. If your travel eSIM has a signal but no data, APN configuration is almost always the cause.

Steps specific to travel eSIMs:
1. Open the Airalo (or provider's) app → go to your plan → tap "Details" for the APN string
2. Enter it manually in Android's APN settings; iPhone usually auto-configures
3. Set the eSIM as the data SIM in cellular settings
4. Enable Data Roaming for the eSIM line if you're outside its home coverage area

"eSIM technology allows users to switch carriers without physically swapping a SIM card — but the underlying activation process still depends on carrier network provisioning, which requires a completed account setup on the carrier's backend before the eSIM will register service." — GSMA Consumer eSIM Overview

In Short

Most eSIM problems are one of four things: the carrier is still provisioning the line (wait 24 hours), the eSIM isn't set as the active data SIM (fix in Settings), the APN is missing on Android (enter it manually), or the QR code was already used (request a new one). If none of those apply, resetting your network settings resolves the vast majority of remaining cases.

What You Also May Want To Know

Why is my eSIM not working after activation?

After scanning the QR code and completing the carrier activation steps, eSIMs often show 'No Service' for up to 24 hours while carrier provisioning completes on their end. Restart your phone, ensure the eSIM line is set as the active data line in Settings, and confirm your account is in good standing with no overdue balance.

Why is my Airalo eSIM not working?

Airalo eSIMs require manual APN configuration on most Android devices (Settings > Mobile Network > Access Point Names). On iPhones, APN is set automatically. If you see a signal but can't use data, the APN is the issue. Airalo's app shows the correct APN settings in the 'Details' section for each purchased plan. Also confirm the eSIM is set as your data line, not just active.

Can I use an eSIM and a physical SIM at the same time?

Yes, on dual-SIM devices. However, only one line can be the active data line at a time. If your physical SIM is set as the preferred data line, eSIM data won't work even though the eSIM is installed. Go to Settings > Cellular > Cellular Data and switch the data line to your eSIM.

Why does my eSIM say 'No Service' even though it was working?

'No Service' on a working eSIM is most often caused by the phone losing the carrier's network registration after a software update, airplane mode being left on, or a temporary carrier outage. Toggle airplane mode on and off. If No Service persists, reset your Network Settings.

How many eSIMs can I have on my phone?

iPhones from iPhone XS onward can store up to 8 eSIM profiles but only use 2 lines simultaneously. Most Android devices support 1–2 eSIM profiles. Check your carrier — some restrict eSIM transfers to prevent activation on multiple devices.

Reviewed and Updated on May 31, 2026 by Adelinda Manna