eSIM Not Working After Switching Phones? Fix No Service, SOS and Mobile Data

Updated October 24, 2026. If your eSIM stopped working after you changed phones, first separate a transfer failure from a service failure. The new phone may have an eSIM profile but no carrier service, the line may be disabled, the wrong SIM may be selected for data, or the carrier may still be provisioning the number.

This guide focuses on what happens after the phone switch: No Service, SOS Only, Searching, calls that work while data fails, a line that appears inactive, and a phone that shows an eSIM but cannot register on the network. If the transfer itself stops, the QR code is rejected, or the transfer option never appears, use our separate eSIM transfer failed guide instead. That separation prevents you from repeating a transfer when the real problem is already-installed service.

The safest order to restore service

Do these checks before deleting or reinstalling any profile:

1. Keep the old phone and its working eSIM available until the new phone completes a real call, plain SMS, and mobile-data test.
2. Connect the new phone to reliable Wi-Fi, charge it, and turn Airplane Mode off.
3. Check whether the new phone lists the eSIM under Cellular, Mobile Service, SIM manager, or Network & internet.
4. Make sure the intended line is turned on and selected for calls, messages, and mobile data when more than one SIM is present.
5. Restart the new phone once, then check whether the carrier name or signal returns.
6. If the line still cannot register, contact the carrier and ask whether the profile is provisioned for the new phone’s EID/IMEI.

Do not factory-reset the new phone for a carrier-provisioning problem. Do not delete a working old eSIM just because the new phone displays an error. A profile removed from a phone often requires the carrier to issue a replacement activation.

What exactly is failing?

The same phrase—“my eSIM is not working”—can describe several different failures. Match the visible state before changing settings.

These are diagnostic clues, not a remote diagnosis. The carrier’s account and provisioning system can confirm the line state; the phone can only show what it currently sees.

A five-minute recovery test

Use the same test order on iPhone, Samsung Galaxy, Pixel, and other Android phones:

1. Turn Wi-Fi on and open the SIM or Cellular settings. Record whether the line is absent, inactive, activating, or active.
2. Turn the eSIM line on if it is listed but disabled. Do not disable every line on a dual-SIM phone.
3. Turn Airplane Mode on briefly, turn it off, and wait for the carrier name or signal indicator to return.
4. Restart the phone normally. Avoid repeated profile deletion while the carrier is still processing an activation.
5. With Wi-Fi off, test a normal outgoing call, an incoming call, a plain SMS, and a simple website.
6. Write down which test failed. “No signal,” “calls work but data fails,” and “SMS fails” should be reported to the carrier as different symptoms.

If service returns after the restart, stop there and verify the line again later. A temporary registration glitch is not a reason to reset network settings or request another eSIM.

Confirm that the eSIM is active, not merely installed

An eSIM profile can appear in settings without the line being ready for calls or data. Check three separate facts:

• Profile present: the phone lists the carrier plan or number.
• Line enabled: the switch for that plan is on.
• Network service: the phone registers on the carrier and passes the call, SMS, and data tests.

On a dual-SIM phone, also check the default choices. A phone can show signal for one line while sending data through another, disabled line, expired travel plan, or a line with no allowance. Do not infer the active data line from the presence of a signal icon alone.

iPhone: eSIM listed but No Service, SOS, or Searching

Apple’s current troubleshooting sequence starts with Wi-Fi or a hotspot, a supported active plan, and the latest iOS available for the device. Apple recommends toggling Airplane Mode, checking the number under Settings → Cellular, turning the line off and on if it is shown, and restarting the iPhone. See Apple’s official eSIM troubleshooting steps.

Use this order:

1. Open Settings → Cellular or Mobile Service and select the affected plan.
2. Make sure Turn On This Line is enabled. If the line is not listed, do not invent manual values; ask the carrier how it should be activated.
3. Confirm the intended line is selected under cellular data when two plans are installed.
4. Turn Airplane Mode on and off, then restart the iPhone.
5. Connect to Wi-Fi and open Settings → General → About. Apple says a carrier-settings update may appear in the eSIM section; install it only when iOS offers it.
6. Test a normal call and mobile data with Wi-Fi switched off.

If the line remains inactive, gather the exact message, phone number, carrier account details, and EID/IMEI privately for the carrier. Apple’s support guidance recommends carrier contact when the eSIM still cannot be set up after these checks.

An iPhone that completed Quick Transfer should deactivate the previous SIM when the new plan activates. That is different from an iPhone that shows an unfinished activation. If neither device works, contact the carrier before deleting anything.

Samsung Galaxy: check SIM Manager and network eligibility

On Galaxy phones, open Settings → Connections → SIM manager. Confirm that the eSIM is listed and enabled. If the new phone has two lines, review the preferred SIM for calls, messages, and mobile data.

Then:

1. Check that the new Galaxy is not locked to another network.
2. Turn the affected eSIM off and on from SIM manager if it is already listed.
3. Toggle Airplane Mode, restart, and test service with Wi-Fi off.
4. If data alone fails, verify that the eSIM is the selected mobile-data line and ask the carrier for APN instructions instead of copying random values from another network.
5. If the eSIM is missing or still inactive, use the carrier’s official activation or QR route. Samsung’s transfer menu is carrier-, model-, software-, and region-dependent.

Samsung documents both device-to-device transfer and carrier QR activation. If the transfer option is missing, that does not prove the Galaxy is defective. A physical SIM, an already-active eSIM, a completed setup wizard, or a carrier that does not support transfer can change what the menu shows.

Do not keep scanning an old QR code while waiting for carrier support. Ask whether the carrier must cancel a pending order, bind the profile to the new EID, or issue a fresh activation.

Google Pixel: verify the line and the data route

On a Pixel, open Settings → Network & internet → SIMs. Look for the eSIM, make sure it is enabled, and check which line is selected for mobile data. Google’s current transfer help places the supported transfer route under Add SIM → Transfer SIM from another device, but an available menu does not guarantee that every carrier supports it. See Google’s current Pixel transfer instructions.

For an eSIM that is already installed:

1. Open the affected line under SIMs and confirm that it is enabled.
2. Check the preferred SIM for calls and mobile data.
3. Toggle Airplane Mode, restart once, and test a normal call and a website with Wi-Fi off.
4. Check for a carrier or system update through the phone’s normal settings.
5. If the line is present but cannot register, ask the carrier to check activation against the Pixel’s EID/IMEI.

If the eSIM is not present, use Add SIM → Set up an eSIM or the carrier’s official app. Google advises trying an eSIM transfer again only for a persistent issue and contacting the carrier when it continues. Do not remove a working profile merely because the automatic transfer menu is unavailable.

Why a phone can show signal but still have no internet

Signal bars show that the phone sees a network. They do not prove that the correct plan has data access. Check these possibilities:

• The physical SIM is selected as the data line instead of the new eSIM.
• The eSIM plan has expired, reached its data limit, or does not include the current roaming area.
• The carrier has activated voice but has not completed data provisioning.
• A VPN, private DNS, or app-level setting is interfering with traffic.
• An APN is required by that carrier and is missing or incorrect.
• The phone is connected to a network that the plan cannot use.

Start with the default-data line and plan status. If the carrier confirms that APN values are required, use only the values it provides for the exact plan and country. Do not copy APN settings from a travel blog or another operator. A network reset can erase saved Wi-Fi and Bluetooth preferences, but it cannot repair an account that has not been provisioned.

Calls work but SMS does not

A completed voice call does not prove every service on the number has been provisioned. Send a plain SMS from another phone, not an iMessage, RCS chat, WhatsApp message, or banking code. If plain SMS fails, check the active line and contact the carrier. If plain SMS works but one bank or website does not send a code, investigate that service’s number, rate limits, sender restrictions, or security delay.

Use our separate guide for calls working while SMS verification codes do not. It covers the distinction between ordinary SMS delivery and one service’s OTP delivery without mixing it with eSIM activation.

Dual SIM after changing phones

Dual SIM creates several misleading states:

1. The old physical SIM remains active for calls while the new eSIM is selected for data.
2. The eSIM appears active, but the phone keeps using the other line for outgoing messages.
3. One line has coverage while the other is still waiting for carrier activation.
4. A travel eSIM is selected for data while the home line is expected to receive calls or SMS.

Open the phone’s SIM settings and record the selected default for calls, messages, and data. Change one default at a time and run the same call, SMS, and data tests again. If a line is not needed, disable it temporarily only after you understand which number it carries; do not delete the profile during diagnosis.

Carrier Settings, software, lock, and compatibility checks

Before requesting a new eSIM, verify the conditions that software alone cannot fix:

• The exact phone model and regional variant support eSIM.
• The phone is unlocked or approved for the carrier.
• The carrier supports the plan on that model and country.
• The account is active and not suspended.
• The line is provisioned for the new EID/IMEI.
• The carrier has no outage or maintenance affecting activation.
• The device has a current supported operating-system version.

Apple specifically documents checking carrier settings under Settings → General → About on iPhone. Samsung and Google use different menus, so follow the exact device support page rather than assuming that a setting exists on every model. The carrier can confirm account and EID/IMEI association; the manufacturer can confirm device compatibility.

When network reset is reasonable—and when it is not

Network reset is a last resort for saved network configuration, not a first response to a missing eSIM or failed carrier activation. Consider it only after:

1. The eSIM is present and enabled.
2. The carrier confirms the line is active on the new device.
3. Airplane Mode and one normal restart made no difference.
4. The problem looks like saved Wi-Fi, Bluetooth, or network configuration rather than an account state.
5. You have the Wi-Fi passwords and know what other settings will be cleared.

Read the on-screen warning before confirming. A reset can remove saved Wi-Fi networks, VPN or Bluetooth relationships, and other preferences. It does not recreate a deleted eSIM and does not generate a new carrier profile.

If the old phone still works

Treat the old phone as the recovery path. Leave its eSIM intact, use it to receive carrier verification, and keep it nearby if the manufacturer’s supported transfer requires proximity. If the actual transfer process fails or the QR code is rejected, follow the dedicated eSIM transfer-failed article rather than repeating post-switch troubleshooting here.

Do not wipe or trade in the old phone until the new phone passes:

• an outgoing and incoming cellular call;
• a plain SMS send and receive;
• mobile data with Wi-Fi turned off;
• the specific service that motivated the phone change.

If both phones have lost service

This state often needs carrier action. Use Wi-Fi to open the carrier’s official account page or contact support from another phone. Explain that the old profile is no longer working and the new phone has not completed activation. Ask the carrier to check:

1. whether the number is active, suspended, or in a pending transfer state;
2. which device EID/IMEI currently owns the line;
3. whether a previous activation must be cancelled;
4. whether a replacement eSIM or carrier activation is required;
5. whether SMS and data provisioning completed separately from voice.

Do not buy an “eSIM unlock” service or share a QR code, account PIN, OTP, EID, or IMEI in public comments. Use only the carrier’s verified support channel.

If you deleted the eSIM

A deleted profile normally cannot be restored from the phone’s recycle bin. Deleting the profile does not necessarily cancel the carrier contract, but it can remove the credentials needed to use the line on that device. Ask the carrier for a replacement profile or reprovisioning.

Tell support whether the old phone was deleted manually or was deactivated automatically after a successful transfer. That distinction helps the carrier identify a pending activation. Keep the new phone on Wi-Fi and avoid scanning several old QR codes while the request is being investigated.

Recovery matrix

What to tell the carrier

Prepare the information privately: exact phone model, operating-system version, carrier and plan type, number involved, error wording, time of the attempted switch, whether the old phone still has service, and the new device’s EID/IMEI if requested through the official channel.

Use a direct description such as: “The eSIM is listed on the new phone, but it shows No Service after switching devices. Please check whether my line is provisioned for this EID, whether there is a pending activation, and whether calls, SMS, and data are all enabled.”

That wording tells support to inspect the carrier state instead of sending you through the same generic transfer steps again.

Official documentation and boundaries

Phone menus, carrier eligibility, and regional model support change. Use the source that matches the device:

• Apple Support: If you can’t set up an eSIM on your iPhone
• Apple Support: Set up eSIM on iPhone
• Apple Support: SOS, No Service, or Searching
• Samsung Support: SIM cards for Galaxy phones and tablets
• Samsung Support: Troubleshooting eSIM transfer
• Google Pixel Help: Transfer a SIM to a new phone
• Google Pixel Help: Set up a new eSIM

The stopping rule is practical: keep a working old line, confirm the new profile is present and enabled, test calls/SMS/data separately, and ask the carrier to verify provisioning when the phone cannot register. That protects the number and keeps a post-switch service problem separate from a failed transfer procedure.