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eSIM Activation Failure, Stuck Number Porting, and Sudden Loss of Cellular Service

Xexlẽme kpatawo toa vovo le dukɔ ɖesiaɖe me. Axa sia zã 911, si nye xexlẽdzesi na United States kple Canada. Dukɔ bubu geɖewo zãa 112, 999, alo xexlẽdzesi bubu. Di xexlẽdzesi si le miaƒe dukɔa me.

Losing cellular service unexpectedly, whether your smartphone suddenly drops to "SOS Only" or "No Service", an eSIM transfer freezes at "Activating..." while setting up a new phone, or a carrier number transfer gets stuck in a porting limbo, cuts off both your voice communications and the SMS two-factor authentication (2FA) codes protecting your bank and email accounts. Worse, a sudden, unexplained loss of cellular signal on a working phone is the primary early warning sign of an active SIM swap attack in which cybercriminals hijack your mobile number to drain financial accounts.

Whether you are locked out of cellular service during an upgrade at home, dealing with a rejected port-out request between carriers, or stranded at an international airport without mobile data, you must diagnose the failure within minutes. This guide walks you through ruling out an active SIM swap attack, recovering stuck eSIM SM-DP+ provisioning profiles on iOS and Android, clearing Number Portability Administration Center (NPAC) port conflicts, forcing manual roaming radio attachment abroad, and restoring emergency communications.

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Wɔ esia fifia

  1. Determine immediately whether you are under an active SIM swap cyberattack. If your phone suddenly dropped to "SOS Only", "No Service", or "SIM Not Provisioned" at a time when you were not upgrading your phone or switching carriers, connect to Wi-Fi immediately and check your email inbox for messages from your mobile carrier saying "Your SIM card has been changed" or "Your number transfer request is complete". If you did not authorize a change, call your carrier fraud department immediately and follow our SIM swapping emergency guide to lock your phone line and financial accounts.
  2. Never delete an eSIM profile from your phone while troubleshooting unless a carrier technician has already issued a brand-new replacement QR code. Unlike a physical plastic nano-SIM card that you can pop out and re-insert, an eSIM profile downloaded from a carrier SM-DP+ (Subscription Manager Data Preparation) server uses a single-use cryptographic activation token (EID/ICCID binding). If you tap "Delete eSIM" on an iPhone or "Erase SIM" on Android during a network outage, you cannot re-scan the old QR code to get it back; only the carrier can generate a fresh eSIM download token.
  3. If you are in physical danger or facing a medical emergency with "SOS Only" or "No Service" displayed, dial your emergency number anyway. Under global 3GPP GSM/UMTS/LTE/5G standards, any handset displaying "SOS Only" or "Emergency Calls Only" will bypass carrier SIM authentication and transmit your call over any competing cellular tower within radio range (even without an active SIM or eSIM profile). Dial your local emergency number (911 in the United States and Canada, 112 across the European Union and GSM networks globally, 999 in the United Kingdom, or see our xexlẽdzesi siwo wozãna kpata directory), or trigger Apple Emergency SOS via Satellite / Android Satellite SOS under an open sky.
  4. If an iPhone-to-iPhone or Android-to-Android eSIM Quick Transfer is stuck on "Activating...", place both phones within 5 centimeters (2 inches) of each other on the same Wi-Fi network and toggle Airplane Mode ON for 30 seconds, then OFF. Over-the-air eSIM provisioning requires an uninterrupted HTTPS connection between your phone LPA (Local Profile Assistant) and the carrier SM-DP+ server to register your hardware 32-digit EID (Embedded Identity Document) on the carrier Home Subscriber Server (HSS).
  5. If your phone number is stuck mid-port between two carriers (Split Service), call the "Porting and Activations Department" (Tier 2 PAC) of the NEW carrier, not general customer service. Have the exact Account Number, Number Transfer PIN (Port-Out PIN), and Billing Street Address / ZIP or Postal Code from your old carrier billing statement in front of you. Over 90 percent of stuck number ports are held up by an automated NPAC data mismatch or an unlifted Number Lock / Port Freeze on the losing carrier account.
  6. Keep your old phone and old SIM/eSIM intact until two-factor authentication (2FA) is verified on the new phone. Before trading in or factory-wiping an old handset, verify that both incoming SMS short-code texts (the 5-digit or 6-digit numbers used by banks) and outbound voice calls work on the new device, and verify your authenticator apps using our MFA lockout kple authenticator gbugbɔgaxɔ fia afɔɖoƒe.

Never read a 6-digit verification text or 'Port-Out PIN' to anyone who calls you claiming to be your mobile carrier

Mobile carrier fraud departments will never call you out of the blue and ask you to read back an SMS verification code or generate a Number Transfer PIN to "stop a hacker" or "upgrade your 5G tower." Scammers spoof your carrier official customer service phone number on Caller ID to trick you into reading them the exact one-time passcode required to complete a fraudulent eSIM transfer onto their device. Hang up and dial the official number on your carrier bill or visit a corporate retail store in person.

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Cellular lockout, eSIM failure, and stuck port triage decision tree

flowchart TD
    Root["Sudden Loss of Cellular Service, Failed eSIM Transfer, or Stuck Number Port"] --> Context{"What Happened Right Before Service Stopped?"}

    Context -->|"Nothing: Phone suddenly dropped to SOS Only / No Service unexpectedly"| SwapCheck["1. Connect to Wi-Fi immediately; check email/SMS for 'SIM changed' alerts<br/>2. Toggle Airplane Mode 30s; check carrier outage map<br/>3. Call Carrier Fraud Dept from another phone to check if IMEI/EID was swapped"]

    Context -->|"Upgrading Phone: eSIM Quick Transfer or QR Code Stuck on Activating"| eSIMFix["Step 1: DO NOT delete the eSIM profile<br/>Step 2: Connect to stable Wi-Fi (disable VPN/Private Relay) and reboot phone<br/>Step 3: Check if old phone already lost signal (HSS switched to new EID)<br/>Step 4: Have carrier re-push fresh SM-DP+ profile to new 32-digit EID"]

    Context -->|"Switching Carriers: Number Port Stuck or 'Split Service' (Calls work, SMS dead)"| PortFix["Step 1: Check Old Carrier app to make sure 'Number Lock / Port Freeze' is OFF<br/>Step 2: Verify exact Account Number, Port-Out PIN, and Billing ZIP<br/>Step 3: Call New Carrier Tier-2 Porting Activation Center (PAC) to resubmit NPAC order"]

    Context -->|"Traveling Abroad: Landed in Foreign Country with No Roaming Signal or Dead Travel eSIM"| RoamFix["Step 1: Turn ON Data Roaming in Cellular Settings<br/>Step 2: Switch Network Selection from Automatic to Manual; test each partner carrier<br/>Step 3: Verify APN settings and force LTE/4G instead of 5G SA"]

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Understanding how eSIM provisioning (SM-DP+) and number porting (NPAC) work

To fix a dead eSIM or an unmoving number port without spending four hours being transferred between frontline call-center scripts, you need to understand the exact telecom systems involved and use the terminology that gets you routed to Tier 2 Network Provisioning or the Porting Activation Center (PAC).

1. How eSIM activation works under the hood (GSMA SGP.22 Architecture)

Unlike a traditional removable SIM card where subscriber keys (IMSI and \(K_i\) authentication key) are permanently burned into a plastic microchip at a factory, an eSIM (eUICC, Embedded Universal Integrated Circuit Card) is a blank, rewritable security chip soldered onto your phone motherboard:

  • EID (Embedded Identity Document): Every eSIM chip has a globally unique 32-digit numeric serial number (starting with 89..., found in Settings > General > About on iOS or Settings > About phone > SIM status on Android).
  • SM-DP+ Server (Subscription Manager Data Preparation Plus): When you transfer a line or scan an eSIM QR code, your phone uses Wi-Fi to contact the carrier SM-DP+ server, presents its 32-digit EID and a one-time Activation Code / Matching ID, and downloads an encrypted cryptographic operator profile containing your ICCID (SIM card number) and IMSI (International Mobile Subscriber Identity).
  • HSS / UDM (Home Subscriber Server / Unified Data Management): Le ɣeyiɣi ma ke me la, carrier billing system la trɔa asi le eƒe core network database (HSS na 4G LTE, UDM na 5G Standalone) ŋu be wòaɖe wò SIM xoxoa ƒe ICCID ɖa eye wòaɖe mɔ na wò eSIM yeyea ƒe ICCID kple hardware IMEI.
  • Afisi wògbã le: Ne wò Wi-Fi ɖiɖi le eƒe kɔpiwɔwɔ titina, alo ne VPN xe mɔ na SM-DP+ TLS asiléle le esi ʋukula HSS tsi wò telefon xoxoa ƒe SIM nu xoxo vɔ megbe la, wò telefon xoxoa megawɔa dɔ o esime wò fon yeyea mete ŋu wu profile la ɖoɖo nu o, si ana "No Service" nasu asiwò le asitelefon eveawo dzi.

2. Alesi asitelefon dzi xexlẽdzesiwo tsɔtsɔ yi teƒe bubu wɔa dɔe (LNP kple NPAC / Syniverse / Iconectiv) .

Ne èɖe telefon xexlẽdzesi aɖe tso Dɔwɔƒe A (si nye Bu / Donor Carrier) yi Carrier B (si nye Gaining / Recipient Carrier) la, wowɔa ɖoɖo ɖe asitɔtrɔa ŋu to dukɔa ƒe titina gaxɔgbalẽvi dzi: - Le United States kple Canada: Xexlẽdzesiwo Ʋuʋu ƒe Dɔwɔƒe (NPAC), si Iconectiv le dɔ wɔm le, si trɔa asi le Teƒe Mɔfiame Xexlẽdzesi (LRN) ŋu le telefonkadodo ƒe tɔtrɔwo katã me le dukɔa me godoo. - Le United Kingdom: Porting Authorization Code (PAC) ɖoɖo si dzi Ofcom (afisi nèŋlɔa nyatakakawo ɖo le PAC be 65075 be woaxɔ ŋɔŋlɔdzesi 9 ƒe ŋɔŋlɔdzesiwo ƒe xexlẽdzesi si anɔ anyi ŋkeke 30). - Le Europa Dukɔwo ƒe Ðekawɔha, Australia, kple Asia-Pacific: Dukɔa ƒe Nutoa me Xexlẽdzesiwo Ʋuʋu (LNP) ƒe xɔxlɔ̃ siwo zãa kpeɖodzi si amesi xɔe kplɔ alo nunala ƒe SMS ƒe kpeɖodzi.

Diagnostic matrix: Cellular & eSIM ƒe kpododonu ƒe dzesiwo kple ke siwo gbɔ wòtso

Screen Message alo Dzesi si Sɔ pɛpɛpɛ Nusi Le Dzɔdzɔm Le Carrier Network Me Afɔɖeɖe si woawɔ atsɔ aɖɔ ame ɖo enumake
"SOS Only" / "Emergency Calls Only" (edze zi ɖeka le telefon si nɔ dɔ wɔm tsã dzi) Wò telefon radio kpɔa asitelefon xɔ kɔkɔwo, gake wò aƒeme dɔwɔƒe HSS gbe wò SIM ƒe IMSI/ICCID ƒe ŋkɔ ŋɔŋlɔ. Nusiwo gbɔ wòtso: (1) SIM ƒe asitɔtrɔ si ŋu womeɖe mɔ ɖo o; (2) Fexexe ƒe mɔxexeɖedɔa nu; (3) Nutoa me xɔ kɔkɔwo ƒe nutsotso; alo (4) SIM-ti si gblẽ. 1. Kpɔ Wi-Fi email ɖa be SIM ƒe tɔtrɔ ŋuti nuxlɔ̃amewo hã le eme hã.
2. Trɔ Yameʋu ƒe Nɔnɔme hena sɛkɛnd 30.
3. Ge ɖe carrier web portal me be nàkpɔe ɖa be yeƒe IMEI kple ICCID metrɔ o.
eSIM tsi "Activating..." alo "Connecting to Network..." dzi hena >aɖabaƒoƒo 15 eSIM ƒe nɔnɔmetata si woɖe ɖe wò eUICC chip me, gake carrier core network switch (HSS/UDM) meɖe gbeƒã dɔwɔwɔ ƒe aflaga haɖe o, alo Apple/Google push provisioning ƒe ɣeyiɣia wu enu. 1. Mègatutu eSIM la MELE o.
2. Tsi VPN alo iCloud Private Relay ɖesiaɖe.
3. Gbugbɔ dze telefon la gɔme esime nèle Wi-Fi sesẽ dzi.
4. Ne egakpɔtɔ tsi le miniti 30 megbe la, bia tso ʋukula Tier 2 si be "wòagbugbɔ awɔ ɖeka kple HSS ƒe ɖoɖowɔwɔ na EID/ICCID."
"Meteŋu Wu Asitelefon ƒe Ðoɖo ƒe Tɔtrɔ Nu O" / "Kɔda sia megale dɔ wɔm o" Woɖu Matching ID si wozãna zi ɖeka le carrier SM-DP+ server dzi xoxo le kɔpiwɔwɔ ƒe agbagbadzedze si do kpo nu ta, alo wò fon la ƒe carrier subsidy lock (SIM Locked) le esi. 1. Kpɔ Settings > General > About > Carrier Lock (ele be nàgblɔ be "SIM ƒe mɔxexe aɖeke meli o").
2. Bia tso dɔwɔƒea si be wɔ eSIM ƒe nɔnɔmetata yeye ŋutɔ (ICCID yeye) eye wòatutui OTA to wò xexlẽdzesi 32 EID dzi.
"Split Service" After Porting (Àteŋu aƒo ka siwo do go, gake kaƒoƒo siwo va la yia wò telefon xoxoa dzi eye 2FA SMS texts nu yina) NPAC melidzeƒe ƒe ɖoɖo wu enu le ʋukula ƒe tɔtrɔ yeyea me, gake LRN ƒe gbeƒãɖeɖea mewu kaka nu le ʋuɖolawo dome SS7/SIP SMS nuƒoƒoƒulawo katã (Syniverse/SAP) me o, alo wotɔ melidzeƒea ɖe Resolution Required ƒe asiléle dzi. 1. Ƒo ka na New Carrier Porting Department (PAC).
2. Bia wo be woakpɔ NPAC Port Status (eɖanye Pending, Conflict/Mismatch, alo Completed) eye nàbia tso wo si be "rebroadcast the LRN in NPAC" ne wotsi gaƒoƒo 4 megbe.
Mɔzɔzɔ eSIM (Airalo, Holafly, Nomad, Saily) Wode Duta, Fia Bars, Gake Zero Internet Data Wò telefon si wotsɔ kpe ɖe duta hadɔwɔla ƒe xɔ kɔkɔa ŋu, gake Data Roaming le OFF na eSIM ka ma, alo APN (Access Point Name) la le ƒuƒlu/mesɔ o. 1. Ʋu Mɔzɔzɔ eSIM ƒe Ðoɖowo -> Trɔ Data Roaming ON.
2. Kpɔ dɔwɔnu si naa dɔwɔnua ɖa be APN ka tututu (e.g., . globaldata, . wbdata, . internet) eye nàŋlɔe kple asi ɖe Celular Data Network me.

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Afɔɖeɖe 1: Kpata ƒe vovototodedeameme na amesi wosusu be SIM Swap Attack

Ne menɔ agbagba dzem be yeatrɔ telefon alo mɔ̃ siwo tsɔa nu o esime wò fon ɖiɖi zi ɖeka va ɖo "SOS Ko" alo "Subɔsubɔdɔ aɖeke meli o" la, bu nutsotsoa be enye dedienɔnɔ ƒe nudzɔdzɔ si le vevie ŋutɔ le miniti 10 gbãtɔawo me:

  1. Ge ɖe Wi-Fi dzi enumake eye nàlé ŋku ɖe wò email ŋu:
  2. Kpɔ wò inbox, Trash, kple Spam ƒe agbalẽdzraɖoƒewo (zi geɖe la, amedzidzela siwo gblẽ wò e-mail me xoxo la wɔa filter si tutua gbedasiwo ɖa le wo ɖokui si tso AT&T, Verizon, T-Mobile, Rogers, Vodafone, EE, alo O2).
  3. Look for notices saying "Your SIM card has been updated", "Your eSIM transfer is complete", or "Port-out request received".
  4. Call your carrier from a second phone (or use Wi-Fi calling / Skype / Google Voice):
  5. Ask the representative directly: "Did the ICCID (SIM number), EID, or IMEI on my line change in the last 24 hours, or is there an active port-out request on my number?"
  6. If the representative confirms an unauthorized eSIM change or port-out:
    • Demand an immediate "Line Suspension / Fraud Block" on the unauthorized SIM.
    • Have the Fraud Department reclaim your number onto your physical device 32-digit EID (or visit a corporate carrier retail store in person with two forms of government photo ID).
    • Immediately execute the full containment steps in our SIM swapping emergency guide and our gadzraɖoƒe ƒe gakɔnta dzi dada ŋuti mɔfiame.

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Step 2: How to fix a failed or stuck eSIM activation (iPhone and Android)

When transferring service to a new iPhone (especially US iPhone 14, 15, 16, and newer models that have no physical SIM card tray) or a new Android flagship (Samsung Galaxy S24/S25, Google Pixel 8/9), eSIM activations fail for five predictable technical reasons. Walk through this checklist in exact order:

1. Disable VPNs, Ad-Block DNS, and Firewall Profiles on Wi-Fi

When your phone downloads an eSIM profile from a carrier SM-DP+ server (such as cust-001-v4-prod-atl2.gdsb.net), the phone Local Profile Assistant must verify the carrier regional IP and TLS certificate: - Open your VPN app (NordVPN, ExpressVPN, Mullvad, Tailscale, Cloudflare WARP, or corporate Cisco AnyConnect / GlobalProtect) and disconnect it completely (also turn off "Connect on Demand" inside Settings > VPN on iOS). - If you use NextDNS, AdGuard DNS, or a home Pi-hole on your router, temporarily switch your phone to a clean Wi-Fi hotspot or standard DNS (1.1.1.1 alo 8.8.8.8), as ad-blocking DNS lists occasionally block carrier telemetry domains required during eSIM activation.

2. Verify whether the carrier switch (HSS) has already cut off the old phone

Look at your old phone right now: - Scenario A: Your old phone STILL has full signal bars and can make a phone call: This means the carrier core network has not yet processed the transfer. Your old SIM is still 100 percent active. On the new phone, cancel the stuck setup screen, update the new phone to the latest iOS or Android version over Wi-Fi first, and then trigger the transfer directly via your carrier official mobile app (My Verizon, T-Life / T-Mobile, myAT&T, My Vodafone, My EE) installed on the new phone rather than relying on the OS-level Bluetooth "Quick Transfer" wizard. - Scenario B: Your old phone just dropped to "SOS Only", AND your new phone is stuck on "Activating...": This means the carrier HSS already switched your phone number to your new phone's EID, and the new phone just missed the final network registration handshake. 1. Wait 10 minutes on strong Wi-Fi. 2. Turn Airplane Mode ON on the new phone, wait 30 seconds, and turn Airplane Mode OFF. 3. Perform a Force Restart on the new phone (on iPhone: quickly press and release Volume Up, quickly press and release Volume Down, then press and hold the Side Button until the Apple logo appears). In over 70 percent of cases, the new phone registers on 5G/LTE immediately upon rebooting.

3. Check for a Carrier Subsidy Lock ("SIM Locked")

If you see "Cellular Plan Cannot Be Added: This eSIM is from a carrier that is not supported on this iPhone", check your device lock status: - On iPhone: Go to Settings > General > About and scroll down to Carrier Lock. - If it says "No SIM restrictions", your phone is fully unlocked and can accept any carrier or travel eSIM in the world. - If it says "SIM locked", the handset is cryptographically locked via Apple's activation server (GSX) to the original carrier selling the phone on an installment plan. You must either pay off the installment balance or request a temporary/permanent IMEI Unlock from the original carrier before any other carrier's eSIM will install.

4. Force Direct OTA Push Provisioning Using Your 32-Digit EID kple IMEI2

If "eSIM Quick Transfer" fails repeatedly and scanning a QR code says "Code Expired", stop trying self-service wizards and give a carrier agent (via online chat on Wi-Fi or from a second phone) two exact numbers from your new phone (Settings > General > About on iOS, or dial *#06# on any phone dialer to pull up the barcode screen): 1. Your 15-digit Digital SIM IMEI (listed as IMEI 2 or Available SIM IMEI). 2. Your 32-digit EID (89...).

Say to the agent: "My eSIM download failed and consumed the single-use SM-DP+ token. Please generate a brand-new eSIM ICCID on my line and push it Over-The-Air directly to my 32-digit EID." Within 60 seconds of the agent saving the EID in their system, a push notification banner reading "Carrier Cellular Plan Ready to Be Installed" will pop up automatically on your Wi-Fi-connected phone screen without needing any QR code at all.

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Step 3: How to unfreeze a stuck mobile number port (LNP Resolution Protocol)

When you switch carriers and request to keep your phone number, automated Local Number Portability (LNP) transfers between mobile networks normally finish in 5 to 30 minutes (or 1 business day in countries using PAC codes like the UK). If your number transfer is stuck for more than 2 to 4 hours, or if you have "Split Service" (outbound calls work, but incoming calls ring your old phone and SMS 2FA texts vanish), your port order is sitting in an NPAC Conflict / Resolution Required state.

The 5 hidden reasons number ports freeze (and how to clear them in 10 minutes)

Call your new (gaining) carrier's direct "Porting and Activations Center" (PAC) rather than general billing support and check these five items:

  1. You left "Number Lock / Port Freeze" turned ON at the old carrier:
  2. Carriers offer Number Transfer Lock (Verizon Number Lock, AT&T Wireless Account Lock, T-Mobile Port Out Protection) to stop SIM swaps. If active when you submitted your port request, the old carrier rejected the transfer automatically.
  3. Fix: Turn OFF Number Lock in your old carrier's app, wait 5 minutes, and ask the new carrier's Porting Department to resubmit the request.
  4. You supplied your 4-digit Account Billing PIN instead of a "Number Transfer PIN":
  5. In the United States, FCC rules require a temporary 6-digit Number Transfer PIN (not your everyday 4-digit billing PIN) to authorize a port-out:
    • Verizon: Dial #PORT (#7678) or go to My Verizon > Account Settings > Number Transfer PIN.
    • AT&T: Dial *PORT (*7678) or go to myAT&T > Profile > People & Permissions > Transfer phone number.
    • T-Mobile: Open the T-Life app -> Account > Profile Settings > Line Settings > Request a Transfer PIN.
    • United Kingdom (EE, Vodafone, O2, Three): Text PAC be 65075 from your old SIM to receive your 9-character Porting Authorization Code within 60 seconds.
    • Canada (Rogers, Bell, Telus): Keep your old SIM inserted until you reply YES within 90 minutes to the mandatory CRTC port-out confirmation SMS.
  6. Billing ZIP/Postal Code or Account Number Mismatch:
  7. The NPAC clearinghouse compares the Account Number, Transfer PIN, and Billing ZIP Code character-by-character. Check the top-right corner of a PDF monthly bill from your old carrier for the exact Account Number and ZIP code.
  8. Landline, VoIP, or Google Voice / NumberBarn Ports Take 2 to 7 Business Days:
  9. Porting from a VoIP provider (Google Voice, Twilio, NumberBarn) or a landline / cable provider is classified as a Wireline-to-Wireless LNP order, which schedules a Firm Order Commitment (FOC) completion date 2 to 5 business days out.
  10. Rebroadcasting the LRN when SMS 2FA Short Codes Fail After Porting:
  11. If calls work both ways after porting, but bank 2FA SMS short codes (5-digit or 6-digit numbers) fail to arrive after 12 hours, ask the new carrier's Tier 2 Technical Support to "refresh/rebroadcast my LRN in NPAC and reprovision SMS short-code features."

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Step 4: Restoring lost cellular service or travel eSIM data when stranded abroad

If you land abroad and neither your home carrier roaming plan nor your prepaid travel eSIM (Airalo, Holafly, Nomad, Saily, Ubigi) has signal, execute these five fixes immediately (Steps 1 through 4 work completely offline):

1. Turn ON "Data Roaming" on the active eSIM line

Both iOS and Android ship with Data Roaming turned OFF on every newly installed eSIM. - iPhone: Go to Settings > Cellular > [Tap your Travel eSIM] -> Toggle Data Roaming to ON. Verify Settings > Cellular > Cellular Data is set to the Travel eSIM and turn OFF "Allow Cellular Data Switching". - Android: Go to Settings > Network & internet > SIMs > [Select eSIM] -> Toggle Roaming to ON.

2. Switch "Network Selection" from Automatic to Manual (Tower Forcing)

Often, your phone automatically latches onto the strongest airport tower (such as Vodafone) even though your travel eSIM only has a roaming contract with Orange or T-Mobile. 1. Open Settings > Cellular > [Your Active SIM/eSIM] > Network Selection and toggle Automatic to OFF. 2. Wait 30 to 90 seconds for the scan to list every local carrier. 3. Tap each carrier on the list one by one, wait 20 seconds, and check if LTE alo 5G appears in the status bar.

3. Force LTE / 4G Instead of 5G Auto / 5G Standalone Abroad

Many international roaming agreements cover 4G LTE across all partner towers while 5G Standalone (5G SA) roaming handshakes fail. Switch Settings > Cellular > [Your SIM/eSIM] > Voice & Data from 5G Auto va ɖo ** .LTE** (alo 4G).

4. Manually enter the Travel eSIM APN (Access Point Name)

Open your travel eSIM app offline to check the required APN name (for example, globaldata, . wbdata, . internet, alo three.co.uk), then enter it under Settings > Cellular > [Travel eSIM] > Cellular Data Network on iOS or Access Point Names on Android.

5. Reset Network Settings

Yi Settings > General > Transfer alo Reset iPhone > Reset > Gbugbɔ Ðo Network ƒe Ðoɖowo (alo Gbugbɔ Ðo Asitelefon ƒe Netwɔƒe ƒe Ðoɖowo le Android dzi). Esia kɔa carrier bundle caches gbegblẽwo ɖa evɔ metutua wò eSIM profile siwo nèda ɖe wò kɔmpiuta dzi o.

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Step 5: How to keep Apple iMessage and FaceTime linked to your domestic phone number while using a Travel eSIM

One of the most frustrating side effects of turning off your domestic SIM card abroad (to avoid 10-dollar-to-15-dollar-per-day carrier roaming fees) is that Apple iMessage and FaceTime immediately deregister your main phone number, breaking your group chats and preventing family members from reaching you:

  • The "Zero-Dollar Roaming Lock" Method (Best if your carrier supports Wi-Fi Calling):
  • Before leaving your home country (while still connected to your domestic carrier tower):
    • Trɔ ON Wi-Fi Kaƒoƒo (Nɔnɔmewo > Asitelefon > [Aƒeme Kaƒoƒo] > Wi-Fi Kaƒoƒo).
    • Yi Settings > Cellular > [Home Line] eye nàtrɔ Data Roaming ɖe OFF me.
    • Tiatia Pro Afɔɖeɖe: Yi Settings > Cellular > [Home Line] > Network Selection, trɔ Automatic OFF, eye nàtsɔ asi atia wò Home Carrier (e.g., Verizon, AT&T, alo T-Mobile).
  • Ne èɖi ɖe duta:
    • Gblẽ wò Home Line ɖe ON, eye nàtrɔ ON wò Travel eSIM hã (ɖoɖo Celular Data -> Travel eSIM).
    • Esi nètu wò Home Line ƒe Network Selection ɖe wò dukɔa me ʋukula (si si xɔ kɔkɔ aɖeke mele le duta o) ŋu ta la, wò Home Line mate ŋu aƒo ka na duta xɔ kɔkɔ aɖeke be wòahe gbesiagbe mɔzɔzɔ ƒe fetu vɛ o. Ke boŋ, iOS ɖoa wò Home Line to Travel eSIM ƒe asitelefon dzi nyatakakawo ƒe kadodo ("[Home Carrier] zãa Asitelefon dzi Nyatakakawo"), si wɔnɛ be wò telefon xexlẽdzesi vevitɔa nɔa dɔ wɔm alafa memama 100 na iMessage, FaceTime, gadzraɖoƒe 2FA SMS nyatakakawo, kple Wi-Fi kaƒoƒo le mɔzɔzɔ ƒe gazazã zero me.

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Mɔxexe ɖe enu: Wò asitelefon dzi akɔntabubua sesẽ ɖe SIM ƒe asitɔtrɔ kple eSIM ƒe mɔxexeɖedɔléle nu

Ne wonya gaɖo wò asitelefon dzi dɔa me ko la, zã miniti atɔ̃ nàtsɔ axe wò asitelefon dzi akɔntabubu kple mɔ̃a ƒe ɖoɖowo:

  • Na "Number Lock / Port Freeze" nawɔ dɔ le wò carrier app me: Trɔ Number Lock (Verizon), Wireless Account Lock (AT&T), Port Out Protection / Takeover Protection (T-Mobile), alo wò carrier ƒe port-out lock si sɔ kplii, eye nàtsie hena miniti 15 siwo ne èɖoe koŋ trɔ carriers la ko.
  • Trɔ nano-SIM kaɖi ŋutɔŋutɔwo ɖe eSIM me (alo nàɖo hardware SIM PIN): Wotsɔ ga ƒo eSIM ɖe wò fon ƒe motherboard dzi eye womate ŋu atsɔ paperclip adoe ado goe ne wò fon bu alo wofi o. Ne ègazãa SIM kaɖi ŋutɔŋutɔ la, na SIM PIN (Settings > Cellular > SIM PIN) nawɔ dɔ eye nàtrɔe enumake tso PIN si nèzãna le mɔ̃a dzi (1111 alo 0000).
  • Ŋlɔ wò xexlẽdzesi 32 la ɖi EID kple xexlẽdzesi 15 IMEI 1 / IMEI 2 offline: Ƒo ** .*#06#** le wò fon dzi fifia, screenshot alo ŋlɔ wò EID kple IMEI xexlẽdzesiwo, eye nàdzra wo ɖo ɖe wò... nyagbe ɣaɣlawo dzikpɔla eyata àte ŋu ade dzesi wò telefon na wò telefondɔwɔƒe alo kpovitɔwo ne screen la gbã gɔ̃ hã.
  • Tsɔ akɔnta veviwo ɖa le SMS 2FA: Tsɔ TOTP kpeɖodzinu ƒe dɔwɔnu si alilikpo do alɔe alo FIDO2 xɔtunu ƒe dedienɔnɔ safuiwo ɖɔ li SMS nuŋɔŋlɔ ƒe kpeɖodzi le wò e-mail, nyagbe ɣaɣla dzikpɔla, kple gadzraɖoƒe ƒe akɔntabubuwo dzi (kpɔ míaƒe... MFA lockout kple authenticator gbugbɔgaxɔ fia afɔɖoƒe).

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Nya siwo wobiaa amewo enuenu

If I accidentally deleted my eSIM on my iPhone or Android while troubleshooting, can I just scan the original QR code again to reinstall it?

Almost never. By GSMA security design, an eSIM QR code points to a single-use activation token on the carrier SM-DP+ server. Once that profile has been downloaded and bound to your phone 32-digit EID once, the server marks the token as "Downloaded / Consumed" so no one else can photograph your QR code and clone your SIM. If you delete an active eSIM profile from your phone settings, you must contact your mobile carrier (or open your travel eSIM provider app) and ask them to generate and issue a brand-new replacement eSIM profile.

Why can I make phone calls after porting my number to a new carrier, but incoming calls still ring my old phone and 2FA texts do not arrive?

This condition is known in telecommunications as "Split Service" or a mixed port state. The moment your new carrier creates your line, their local switch lets you make outbound calls showing your phone number as Caller ID. However, incoming calls and SMS texts from the rest of the world only route to your new phone after the central national clearinghouse (NPAC) finishes validating your old carrier account number and Number Transfer PIN and broadcasts the updated Location Routing Number (LRN) across all networks. If Split Service lasts longer than 4 hours, your port is almost certainly paused due to an incorrect PIN, ZIP code, or active Port Freeze; call the new carrier Porting Department (PAC) immediately.

How can I call 911, 112, or 999 if my phone screen says "SOS Only" or "No Service" and my eSIM is broken?

Every cellular handset sold worldwide is engineered under mandatory 3GPP and FCC/ETSI regulations to prioritize emergency calls above all subscriber billing and SIM rules. When your phone says "SOS Only" or "Emergency Calls Only," it means your home carrier has not authenticated your SIM, but your phone antenna is actively locked onto at least one competing carrier cellular tower nearby. Dialing 911, 112, or 999 forces the nearest tower from any carrier to connect your emergency call immediately, even if your phone has zero active eSIMs installed. If there are zero cellular towers of any kind in range (such as in a wilderness canyon), iPhone 14 and newer models and modern flagship Android phones automatically offer "Emergency Text via Satellite" when you dial 911/112/999.

What happens to my eSIMs if I have to "Erase All Content and Settings" (Factory Reset) my phone?

Both iOS and Android display a critical prompt during a factory reset asking whether you want to **"Keep eSIMs and Erase Data"** or **"Delete eSIMs and Erase Data"**. Unless you are selling, trading in, or permanently giving away the phone, **always choose "Keep eSIMs and Erase Data"**. Because eSIM profiles are stored on a dedicated, isolated hardware security chip (the eUICC) separate from your operating system storage, keeping the eSIM allows your phone to wipe and reinstall iOS or Android from scratch while waking back up on the setup screen with full 5G/LTE cellular service still intact.

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Mɔfiame siwo do ƒome kplii

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Wolé ŋku ɖe dzɔtsoƒewo ŋu

  • GSM Association (GSMA) (International): SGP.22 RSP (Remote SIM Provisioning) Technical Specification for Consumer Devices (SM-DP+, LPA, and eUICC Architecture).
  • Federal Communications Commission (FCC) (United States): Local Number Portability (LNP) Rules, Wireless-to-Wireless One-Business-Day Porting Standards, and Customer Account Takeover / SIM Swap Protection Regulations.
  • Office of Communications (Ofcom) (United Kingdom): General Conditions of Entitlement: Auto-Switch Porting Authorization Code (PAC) and Text-to-Switch Regulations.
  • Number Portability Administration Center (NPAC / Iconectiv) (United States & Canada): Location Routing Number (LRN) Broadcast Architecture and Port Conflict Resolution Procedures.
  • Apple Platform Support & Google Android Documentation: eSIM Quick Transfer, Emergency SOS via Satellite, and Dual-SIM DSDS Roaming Configuration.