eSIM Not Connecting to Network? Here's How to Fix It
Quick Summary
If your eSIM is installed but not connecting, start with these three fixes. They solve roughly 80% of connection problems:
- Turn on Data Roaming for your eSIM line (Settings > Cellular > eSIM > Data Roaming)
- Set the eSIM as your data line (Settings > Cellular > Cellular Data > select eSIM)
- Toggle Airplane Mode on, wait 30 seconds, toggle off
Still stuck? Keep reading for the full troubleshooting guide.
Before You Start
This guide assumes:
- Your device supports eSIM and is carrier-unlocked (check compatibility)
- You bought an eSIM for the country or region you are currently in
- The eSIM profile is already installed on your device
- Your eSIM plan has not expired and still has data remaining
If any of these do not apply, that is likely the reason for the connection issue.
Step 1: The Three Settings That Fix 80% of Issues
Most eSIM connection problems come down to three phone settings being wrong. Check all three before doing anything else.
Turn On Data Roaming
This is the single most common reason a travel eSIM will not connect. Here is why:
Travel eSIMs work by connecting to local carrier partners in your destination country. Your phone sees this as "roaming" because you are on a network that is not the eSIM's home network. If Data Roaming is off, your phone blocks this connection entirely.
Turning on Data Roaming will not cause charges on your home SIM. The roaming setting only applies to the specific line you enable it on. As long as your travel eSIM is set as the data line, your home SIM is not affected.
iPhone
- Open Settings
- Tap Cellular (or Mobile Data in some regions)
- Tap your eSIM line (it may show the carrier name or "Travel" or "Secondary")
- Tap Cellular Data Options
- Toggle Data Roaming to ON
Samsung
- Open Settings
- Tap Connections
- Tap Mobile Networks
- Toggle Data Roaming to ON
If you have dual SIM, go to SIM Manager first and select your eSIM line, then enable roaming for it.
Google Pixel
- Open Settings
- Tap Network & Internet
- Tap SIMs
- Select your eSIM
- Toggle Roaming to ON
Set the eSIM as Your Active Data Line
If you have a physical SIM and an eSIM (dual SIM), your phone only sends data through one line at a time. If your physical SIM is still selected as the data line, your travel eSIM will not carry any traffic even though it is installed and active.
iPhone
- Open Settings > Cellular
- Tap Cellular Data (at the top of the list)
- Select your travel eSIM from the list
Also turn off "Allow Cellular Data Switching" to prevent your phone from accidentally using your home SIM for data.
Samsung
- Open Settings > Connections > SIM Manager
- Tap Mobile Data
- Select your eSIM
Google Pixel
- Open Settings > Network & Internet > SIMs
- Tap your eSIM
- Toggle Use SIM to ON
- Set it as the mobile data SIM when prompted
Toggle Airplane Mode
This forces your phone to disconnect from all networks and reconnect fresh. It clears temporary registration glitches and makes the phone re-authenticate with the carrier.
- Turn Airplane Mode ON (swipe to Control Center or use Settings)
- Wait at least 30 seconds
- Turn Airplane Mode OFF
- Wait 1-2 minutes for the phone to find and register with the network
If those three steps did not solve it, keep going.
Step 2: Network Connection Fixes
Restart Your Phone (Full Power Cycle)
A full restart clears the phone's memory, resets the cellular modem, and forces a fresh network registration. This is different from just locking and unlocking your screen.
- Power the phone completely OFF (not sleep or lock)
- Wait 30 seconds
- Power it back ON
- Wait 1-2 minutes for it to find the network
iPhone: Hold the Side button + Volume button, then slide to power off.
Android: Hold the Power button, then tap Power Off.
Try Manual Network Selection
By default, your phone automatically picks which carrier to connect to. Sometimes automatic selection picks the wrong network or fails to find one at all. Manually choosing a carrier forces your phone to register with a specific network.
iPhone
- Open Settings > Cellular
- Tap your eSIM line
- Tap Network Selection
- Toggle OFF Automatic
- Wait for the list of available networks to appear
- Tap a carrier name to connect
Samsung
- Open Settings > Connections > Mobile Networks
- Tap Network Operators
- Toggle OFF Select Automatically
- Wait for available networks to load
- Tap a carrier to connect
Google Pixel
- Open Settings > Network & Internet > Mobile Network
- Tap Network Operators or Advanced > Automatically Select Network
- Toggle OFF automatic selection
- Tap Search Networks and select a carrier
- Try each network in the list for at least 2 minutes before moving to the next
- If one carrier does not work, try the next one on the list
- Avoid any network labeled "2G" or "3G only" if your eSIM is data-only
- Once you find a working network, you can switch back to Automatic if you want
- Your eSIM provider may list which partner networks are supported in each country
Temporarily Disable Other SIM Lines
If you have a physical SIM and one or more eSIMs active at the same time, they can sometimes conflict. The phone may try to register on the wrong network or run into radio resource issues.
- Disable your physical SIM and any other eSIM profiles you are not using
- Toggle Airplane Mode on and off
- If the travel eSIM connects on its own, re-enable your other SIMs one at a time
- Set your travel eSIM as the data line and keep calls/SMS on your home SIM if needed
iPhone: Settings > Cellular > tap the SIM line > toggle "Turn On This Line" to OFF
Android: Settings > SIM Manager > toggle the SIM line OFF
Step 3: Check APN Settings
What is an APN?
APN stands for Access Point Name. It is a gateway configuration that tells your phone how to reach the carrier's mobile data network. Think of it like a URL for cellular data. Most eSIMs set the APN automatically during installation, but sometimes the auto-configuration fails or gets overwritten.
How to Check and Edit APN
iPhone
Go to Settings > Cellular > tap your eSIM line > Cellular Data Network (or Mobile Data Network).
You should see the APN field at the top. If it is blank or incorrect, type in the APN value provided by your eSIM provider.
Some carriers lock the APN fields on iOS. If you do not see "Cellular Data Network" as an option, you cannot manually change the APN. In that case, try reinstalling the eSIM or resetting network settings to force auto-configuration.
Android
Go to Settings > Network & Internet > Mobile Network > Access Point Names.
To add a new APN:
- Tap + or the menu icon, then New APN
- Enter Name: any label you want (e.g., "Travel eSIM")
- Enter APN: the value from your provider
- Leave username and password blank unless your provider says otherwise
- Set APN Protocol: IPv4/IPv6
- Set APN Roaming Protocol: IPv4/IPv6
- Save and select the new APN
- Restart your phone
To reset APN to default: on the APN screen, tap the three-dot menu and select "Reset to default."
Common Travel eSIM APN Values
If your provider did not specify an APN, these are the most common ones used by travel eSIM providers:
- globaldata (used by many wholesale providers and Airalo partners)
- internet (generic, works with many carriers worldwide)
- wholesale (some wholesale eSIM providers)
Enter APN values exactly as shown. No extra spaces, no capitals unless specified.
Step 4: Software and Settings Checks
If the basic fixes above did not work, one of these software or settings issues may be causing the problem.
Update Your Operating System
Apple and Google regularly release updates that fix eSIM bugs and improve carrier compatibility. Running outdated software can cause activation failures and connection drops.
- iPhone: Settings > General > Software Update
- Samsung: Settings > Software Update > Download and Install
- Google Pixel: Settings > System > System Update
Check Carrier Settings (iPhone Only)
Carrier settings updates contain configuration data specific to your eSIM's carrier, including APN profiles and network preferences. Missing one of these updates can prevent a connection.
Go to Settings > General > About and wait a few seconds. If a carrier settings update is available, a pop-up will appear. Accept it.
Update Carrier Services App (Android Only)
The "Carrier Services" app by Google handles carrier configuration on Android. An outdated or corrupted version can block eSIM connectivity.
- Open Google Play Store and search for Carrier Services
- Tap Update if available
- If problems continue: Settings > Apps > Carrier Services > Storage & Cache > Clear Storage
- Restart your phone
Fix Date and Time Settings
Cellular networks use time synchronization for authentication. If your phone's clock is significantly wrong (which can happen when traveling across time zones with automatic time turned off), the authentication handshake with the carrier will fail.
- iPhone: Settings > General > Date & Time > toggle "Set Automatically" ON
- Android: Settings > System > Date & Time > toggle "Automatic date & time" ON
Disable VPN
Active VPN connections can interfere with eSIM activation and the initial data session. VPNs redirect DNS queries and encrypt traffic in ways that conflict with how carriers establish the first connection.
Turn off any VPN apps during eSIM activation and initial testing. Once you have a stable connection, you can turn the VPN back on.
- iPhone: Settings > VPN & Device Management > toggle VPN OFF
- Android: Settings > Network & Internet > VPN > disconnect
Disable iCloud Private Relay (iPhone) / Private DNS (Android)
These features encrypt DNS queries and route them through alternate servers. This can interfere with the carrier's initial connection setup.
- iPhone: Settings > Apple Account > iCloud > Private Relay > toggle OFF temporarily
- Android: Settings > Network & Internet > Private DNS > set to "Automatic" (not a custom provider)
Check Network Mode (LTE/5G)
Many travel eSIMs are data-only and only work on 4G LTE or 5G networks. If your phone is set to "3G only" or "2G/3G," the eSIM may not be able to connect. 3G networks are being shut down worldwide, so this is increasingly common.
- iPhone: Settings > Cellular > Cellular Data Options > Voice & Data > select "5G Auto" or "LTE"
- Android: Settings > Network & Internet > Mobile Network > Preferred network type > select "4G/5G Auto" or "LTE/5G"
Enable VoLTE
Some carriers require VoLTE (Voice over LTE) or IMS registration before they allow any service at all, including data. If VoLTE is disabled, the carrier may refuse the connection even for data-only plans.
- iPhone: Settings > Cellular > Cellular Data Options > Voice & Data > make sure LTE or 5G with VoLTE is selected
- Samsung: Settings > Connections > Mobile Networks > VoLTE Calls > ON
- Google Pixel: Settings > Network & Internet > SIMs > eSIM > Enable 4G Calling
Turn Off Low Data Mode / Data Saver
These battery-saving features aggressively limit background network activity. In some cases they can slow down or interfere with the initial eSIM authentication process.
- iPhone: Settings > Cellular > Cellular Data Options > Low Data Mode > OFF
- Android: Settings > Network & Internet > Data Saver > OFF
Check Screen Time Restrictions (iPhone)
Screen Time or parental control settings can block cellular changes and prevent eSIM activation.
Go to Settings > Screen Time > Content & Privacy Restrictions and make sure "Cellular Data Changes" is set to "Allow."
Step 5: When Nothing Else Works
If you have tried everything above and still cannot connect, these are the last-resort options.
Reset Network Settings
This clears all saved network configurations: Wi-Fi passwords, Bluetooth pairings, VPN settings, and cellular preferences. It forces your phone to rebuild all network connections from scratch.
- iPhone: Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings
- Samsung: Settings > General Management > Reset > Reset Network Settings
- Google Pixel: Settings > System > Reset Options > Reset Wi-Fi, Mobile & Bluetooth
After the reset, go back through the settings: enable Data Roaming, set the eSIM as your data line, and try connecting again.
Reinstall the eSIM (Last Resort)
Reinstalling removes any corrupted profile data and downloads a fresh copy of the eSIM configuration from the carrier's servers, including new APN and authentication credentials.
- Contact your eSIM provider and confirm the profile can be reissued
- Remove the eSIM:
- iPhone: Settings > Cellular > tap eSIM > Remove eSIM
- Android: Settings > Network & Internet > SIMs > tap eSIM > Delete
- Reinstall using the new QR code or activation link
- Make sure you are on a strong Wi-Fi connection during installation
- After reinstalling, go through all the settings again: turn on the line, set as data SIM, enable Data Roaming
Less Common Causes
If the standard troubleshooting steps did not help, one of these less common issues could be the cause.
LTE/5G Band Incompatibility
Different countries use different radio frequencies for 4G and 5G. A phone sold in one region may not support the LTE bands used in another. This is a hardware limitation with no software fix.
For example, some North American phone models lack Band 20 (800 MHz), which is widely used across Europe. Without it, you might get patchy or no LTE coverage.
How to check: Look up your exact phone model on a site like GSMArena and compare its supported bands against the bands used by carriers in your destination country.
Good news: Flagship phones (recent iPhones, Samsung Galaxy S series, Google Pixel) tend to support the widest range of bands worldwide. Budget and mid-range phones are more likely to have regional band limitations.
IMEI Blacklisted
If a phone was reported stolen, lost, or has unpaid bills, its IMEI can get added to a shared blacklist. When the phone tries to connect to any network, the network checks the IMEI and denies access. This affects both physical SIM and eSIM.
How to check: Contact your carrier with your IMEI number (found in Settings > General > About on iPhone, or Settings > About Phone on Android).
Enterprise Device Restrictions (MDM)
If your phone is managed by your employer through MDM (Mobile Device Management), the IT policy may block eSIM installation or modification. Your company's IT department would need to allow eSIM changes on the device.
- iPhone: Check Settings > General > VPN & Device Management for management profiles
- Android: Check Settings > Security > Device Admin Apps
No Coverage or Network Outage
Sometimes the problem is not your phone. You might be in an area with weak or no coverage (indoors, underground, rural area) or the carrier could be having a temporary outage.
Move outdoors or near a window and try again. If you are in a city and still have no signal, try manual network selection to see if any networks are available at all.
Activation Delays
Most eSIMs connect within 1-5 minutes, but some carriers can take longer to process the activation on their backend. During peak hours (late afternoon local time), it may take up to 15 minutes. In rare cases, carrier processing can take up to 4 hours.
If you just installed the eSIM and it is not connecting yet, wait 15 minutes and try toggling Airplane Mode again before doing more aggressive troubleshooting.
If You Still Cannot Connect
If you have worked through this entire guide and your eSIM still is not connecting, it is time to contact support. Have this information ready to speed up the process:
- Device model (e.g., iPhone 15 Pro, Samsung Galaxy S24)
- Operating system version (e.g., iOS 18.3, Android 15)
- eSIM ICCID (the long number on your eSIM details page)
- Your current location (city and country)
- Screenshots of your Cellular/SIM settings screen
- What you have already tried from this guide
PikaSim users can get help through our live help page where our AI assistant can walk you through additional troubleshooting or connect you with support.
Need an eSIM?
Data plans in 190+ countries. No account required, instant activation. From $3.