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

Nombor kecemasan berbeza mengikut negara. Halaman ini menggunakan 911, nombor untuk Amerika Syarikat dan Kanada. Banyak negara lain menggunakan 112, 999, atau nombor lain. Cari nombor untuk negara anda.

Kehilangan perkhidmatan selular secara tidak dijangka, sama ada telefon pintar anda tiba-tiba jatuh ke "SOS Sahaja" atau "Tiada Perkhidmatan", **pindahan eSIM terhenti pada "Mengaktifkan..." semasa menyediakan telefon baharu atau pemindahan nombor pembawa tersekat dalam porting limbo, memotong kedua-dua komunikasi suara anda dan SMS dua faktor dan pengesahan akaun bank (2FA) yang melindungi bank anda. Lebih buruk lagi, kehilangan isyarat selular secara tiba-tiba dan tidak dapat dijelaskan pada telefon yang berfungsi ialah tanda amaran awal utama bagi serangan pertukaran SIM yang aktif di mana penjenayah siber merampas nombor mudah alih anda untuk menghabiskan akaun kewangan.

Sama ada anda terkunci daripada perkhidmatan selular semasa naik taraf di rumah, menangani permintaan keluar masuk yang ditolak antara pembawa atau terkandas di lapangan terbang antarabangsa tanpa data mudah alih, anda mesti mendiagnosis kegagalan dalam beberapa minit. Panduan ini memandu anda untuk menolak serangan pertukaran SIM yang aktif, memulihkan profil peruntukan eSIM SM-DP+ yang tersekat pada iOS dan Android, membersihkan konflik port Pusat Pentadbiran Mudah Alih Nombor (NPAC), memaksa lampiran radio perayauan manual di luar negara dan memulihkan komunikasi kecemasan.

Lakukan ini sekarang

  1. Tentukan dengan serta-merta sama ada anda berada di bawah serangan siber pertukaran SIM yang aktif. Jika telefon anda tiba-tiba jatuh ke "SOS Sahaja", "Tiada Perkhidmatan", atau "SIM Tidak Diperuntukkan" pada masa anda tidak menaik taraf telefon anda atau menukar pembawa, sambung ke Wi-Fi dengan segera dan semak peti masuk e-mel anda untuk mengetahui mesej daripada kad mudah alih anda* yang menyatakan "Permintaan kad SIM anda telah ditukar" lengkap". Jika anda tidak membenarkan perubahan, hubungi jabatan penipuan pembawa anda dengan segera dan ikuti kami Panduan kecemasan pertukaran SIM untuk mengunci talian telefon dan akaun kewangan anda.
  2. Jangan sekali-kali memadamkan profil eSIM daripada telefon anda semasa menyelesaikan masalah melainkan juruteknik pembawa telah mengeluarkan kod QR gantian serba baharu. Tidak seperti kad SIM nano plastik fizikal yang anda boleh keluar dan masukkan semula, profil eSIM yang dimuat turun daripada pembawa SM-DP+ (Penyediaan Data Pengurus Langganan) menggunakan pelayan pengaktifan/penggunaan kriptografik(IDICC).** Jika anda mengetik "Padam eSIM" pada iPhone atau "Padam SIM" pada Android semasa gangguan rangkaian, anda tidak boleh mengimbas semula kod QR lama untuk mendapatkannya semula; hanya pembawa boleh menjana token muat turun eSIM baharu.
  3. Jika anda berada dalam bahaya fizikal atau menghadapi kecemasan perubatan dengan "SOS Sahaja" atau "Tiada Perkhidmatan" dipaparkan, dail nombor kecemasan anda juga. Di bawah piawaian global 3GPP GSM/UMTS/LTE/5G, mana-mana telefon bimbit yang memaparkan "SOS Sahaja" atau "Panggilan Kecemasan Sahaja" akan memintas pengesahan SIM pembawa dan menghantar panggilan anda melalui mana-mana rangkaian radio selular yang aktif profil). Dail nombor kecemasan tempatan anda (911 di Amerika Syarikat dan Kanada, 112 di seluruh Kesatuan Eropah dan rangkaian GSM di seluruh dunia, 999 di United Kingdom, atau lihat kami nombor kecemasan 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. Pastikan telefon lama anda dan SIM/eSIM lama anda utuh sehingga pengesahan dua faktor (2FA) disahkan pada telefon baharu. Sebelum berdagang masuk atau mengelap telefon bimbit lama di kilang, sahkan bahawa kedua-dua teks kod pendek SMS masuk (nombor 5 digit atau 6 digit yang digunakan oleh bank) dan panggilan suara keluar berfungsi pada peranti baharu anda, dan sahkan pengesahan peranti baharu anda. Kunci keluar MFA dan pemulihan pengesah panduan.

Jangan sekali-kali membaca teks pengesahan 6 digit atau 'PIN Port-Out' kepada sesiapa yang menghubungi anda yang mendakwa sebagai pembawa mudah alih anda

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.

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

flowchart TD
    Root["Kehilangan Perkhidmatan Selular, Pemindahan eSIM yang Gagal atau Port Nombor Terperangkap"] --> 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"]

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): Simultaneously, the carrier billing system updates its core network database (HSS for 4G LTE, UDM for 5G Standalone) to disconnect your old SIM's ICCID and authorize your new eSIM's ICCID and hardware IMEI.
  • Where it breaks: If your Wi-Fi drops mid-download, or if a VPN blocks the SM-DP+ TLS handshake after the carrier HSS has already deactivated your old phone SIM, your old phone loses service while your new phone fails to finish installing the profile, leaving you with "No Service" on both handsets.

2. How mobile number porting works (LNP and NPAC / Syniverse / Iconectiv)

When you move a phone number from Carrier A (the Losing / Donor Carrier) to Carrier B (the Gaining / Recipient Carrier), the transfer is coordinated through a central national clearinghouse: - In the United States and Canada: The Number Portability Administration Center (NPAC), operated by Iconectiv, which updates the Location Routing Number (LRN) across all telecom switches nationwide. - In the United Kingdom: The Porting Authorization Code (PAC) system regulated by Ofcom (where you text PAC kepada 65075 to receive a 9-character alphanumeric code valid for 30 days). - In the European Union, Australia, and Asia-Pacific: National Local Number Portability (LNP) clearinghouses using either recipient-led validation or donor SMS confirmation.

Diagnostic matrix: Cellular & eSIM failure symptoms and root causes

Exact Screen Message or Symptom What Is Happening in the Carrier Network Immediate Corrective Action
"SOS Only" / "Emergency Calls Only" (appeared suddenly on a previously working phone) Your phone radio sees cellular towers, but your home carrier HSS rejected your SIM's IMSI/ICCID registration. Caused by: (1) Unauthorized SIM swap; (2) Billing suspension; (3) Local tower outage; or (4) Damaged SIM tray. 1. Check Wi-Fi email for SIM change alerts.
2. Toggle Airplane Mode for 30 seconds.
3. Log masuk ke portal web pembawa untuk mengesahkan IMEI dan ICCID anda tidak berubah.
eSIM Tersekat pada "Mengaktifkan..." atau "Menyambung ke Rangkaian..." selama >15 minit Profil eSIM yang dimuat turun ke cip eUICC anda, tetapi suis rangkaian teras pembawa (HSS/UDM) belum lagi menyiarkan bendera pengaktifan, atau Apple/Google push provisioning tamat masa. 1. Jangan JANGAN padamkan eSIM.
2. Matikan mana-mana VPN atau iCloud Private Relay.
3. But semula telefon semasa menggunakan Wi-Fi yang kuat.
4. Jika masih tersekat selepas 30 minit, minta pembawa Tahap 2 untuk "menyegerakkan semula peruntukan HSS untuk EID/ICCID."
"Tidak Dapat Menyelesaikan Perubahan Pelan Selular" / "Kod ini tidak lagi sah" ID Padanan sekali guna pada pembawa pelayan SM-DP+ telah digunakan oleh percubaan muat turun yang gagal, atau telefon anda mempunyai kunci subsidi pembawa (SIM Dikunci). 1. Semak Tetapan > Umum > Perihal > Kunci Pembawa (mesti sebut "Tiada sekatan SIM").
2. Minta pembawa untuk menjana profil eSIM serba baharu (ICCID baharu) dan menolaknya OTA melalui 32 digit EID anda.
"Split Service" After Porting (Anda boleh membuat panggilan keluar, tetapi panggilan masuk pergi ke telefon lama anda dan teks SMS 2FA hilang) The NPAC port order completed in the new carrier switch, but the LRN broadcast has not finished propagating across all inter-carrier SS7/SIP SMS aggregators (Syniverse/SAP), or the port is paused on a Resolution Required hold. 1. Call the New Carrier Porting Department (PAC).
2. Minta mereka menyemak Status Pelabuhan NPAC (sama ada Tertunda, Konflik/Tidak Padan, atau Selesai) dan minta mereka "menyiarkan semula LRN dalam NPAC" jika tersekat selepas 4 jam.
Travel eSIM (Airalo, Holafly, Nomad, Saily) Installed Abroad, Shows Bars, But Zero Internet Data Telefon anda dilampirkan pada menara rakan kongsi asing, tetapi sama ada Perayauan Data DIMATIKAN untuk talian eSIM itu, atau APN (Nama Titik Akses) kosong/salah. 1. Buka Tetapan untuk eSIM Perjalanan -> Hidupkan Perayauan Data.
2. Check the provider app for the exact APN string (e.g., globaldata, wbdata, internet) and type it manually into Cellular Data Network.

Langkah 1: Triaj kecemasan untuk Serangan Pertukaran SIM yang disyaki

Jika anda tidak cuba menukar telefon atau pembawa apabila telefon anda tiba-tiba jatuh kepada "SOS Sahaja" atau "Tiada Perkhidmatan", anggap gangguan itu sebagai insiden keselamatan keutamaan tinggi untuk 10 minit pertama:

  1. Get on Wi-Fi immediately and check your email:
  2. Lihat dalam folder peti masuk, Sampah dan Spam anda (penyerang yang telah menjejaskan e-mel anda sering membuat penapis yang memadamkan automatik mesej daripada AT&T, Verizon, T-Mobile, Rogers, Vodafone, EE atau O2).
  3. Look for notices saying "Your SIM card has been updated", "Your eSIM transfer is complete", or "Port-out request received".
  4. Panggil pembawa anda dari telefon kedua (atau gunakan panggilan Wi-Fi / 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. Jika wakil mengesahkan perubahan atau port-out eSIM yang tidak dibenarkan:
    • Tuntut "Penggantungan Talian / Blok Penipuan" segera pada SIM yang tidak dibenarkan.
    • Minta Jabatan Penipuan menuntut semula nombor anda pada peranti fizikal anda 32 digit EID (atau lawati kedai runcit pembawa korporat secara peribadi dengan dua bentuk ID foto kerajaan).
    • Immediately execute the full containment steps in our Panduan kecemasan pertukaran SIM and our panduan pecah akaun bank.

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 atau 8.8.8.8), as ad-blocking DNS lists occasionally block carrier telemetry domains required during eSIM activation.

2. Sahkan sama ada suis pembawa (HSS) telah memotong telefon lama

Lihat telefon lama anda sekarang: - Senario A: Telefon lama anda MASIH mempunyai bar isyarat penuh dan boleh membuat panggilan telefon: Ini bermakna rangkaian teras pembawa telah belum lagi memproses pemindahan itu. SIM lama anda masih aktif 100 peratus. Pada telefon baharu, batalkan skrin persediaan yang tersekat, kemas kini telefon baharu kepada versi iOS atau Android terkini melalui Wi-Fi dahulu, dan kemudian cetuskan pemindahan terus melalui apl mudah alih rasmi pembawa anda (My Verizon, T-Life / T-Mobile, myAT&T, My Vodafone, My EE) yang dipasang pada telefon baharu dan bukannya bergantung pada wizard Bluetooth "Pemindahan Pantas" peringkat OS. - Senario B: Telefon lama anda baru sahaja diturunkan kepada "SOS Sahaja", DAN telefon baharu anda tersekat pada "Mengaktifkan...": Ini bermakna pembawa HSS sudah menukar nombor telefon anda kepada EID telefon baharu anda dan telefon baharu itu baru sahaja terlepas jabat tangan pendaftaran rangkaian terakhir. 1. Tunggu 10 minit pada Wi-Fi yang kuat. 2. Hidupkan Mod Pesawat pada telefon baharu, tunggu 30 saat dan matikan Mod Pesawat MATI. 3. Lakukan Paksa Semula pada telefon baharu (pada iPhone: cepat tekan dan lepas Volume Up, cepat tekan dan lepas Volume Down, kemudian tekan dan tahan Side Button sehingga logo Apple muncul). Dalam lebih 70 peratus kes, telefon baharu didaftarkan pada 5G/LTE serta-merta selepas but semula.

3. Semak untuk Kunci Subsidi Pembawa ("SIM Dikunci")

Jika anda melihat "Pelan Selular Tidak Boleh Ditambah: eSIM ini adalah daripada pembawa yang tidak disokong pada iPhone ini", semak status kunci peranti anda: - Pada iPhone: Pergi ke Tetapan > Umum > Perihal dan tatal ke bawah ke Kunci Pembawa. - Jika tertera "Tiada sekatan SIM", telefon anda dibuka sepenuhnya dan boleh menerima mana-mana pembawa atau eSIM perjalanan di dunia. - Jika tertera "SIM dikunci", telefon bimbit dikunci secara kriptografi melalui pelayan pengaktifan Apple (GSX) kepada pembawa asal yang menjual telefon pada pelan ansuran. Anda mesti sama ada membayar baki ansuran atau meminta IMEI Unlock sementara/kekal daripada pembawa asal sebelum mana-mana eSIM pembawa lain akan dipasang.

4. Paksa Peruntukan Tolak OTA Terus Menggunakan 32 Digit Anda EID dan IMEI2

Jika "Pemindahan Pantas eSIM" gagal berulang kali dan mengimbas kod QR menyatakan "Kod Tamat Tempoh", berhenti mencuba wizard layan diri dan berikan ejen pembawa (melalui sembang dalam talian pada Wi-Fi atau dari telefon kedua) dua nombor tepat daripada telefon baharu anda (Tetapan > Umum > Perihal pada iOS, atau dail *#06# pada mana-mana pendail telefon untuk menarik skrin kod bar): 1. IMEI SIM Digital 15 digit anda (disenaraikan sebagai IMEI 2 atau IMEI SIM yang Tersedia). 2. 32 digit EID anda (89...).

Katakan kepada ejen: "Muat turun eSIM saya gagal dan menggunakan token SM-DP+ sekali guna. Sila jana ICCID eSIM serba baharu pada talian saya dan tolaknya Over-The-Air terus ke EID 32 digit saya." Dalam masa 60 saat ejen menyimpan EID dalam sistem mereka, satu sepanduk pemberitahuan tolak telah Dipasang secara automatik**"Bacaan Sepanduk Pemberitahuan Tekan Dipasang pada Selular anda **"Bacaan akan Dipasang secara automatik pada Pembawa ****" Skrin telefon yang disambungkan dengan Wi-Fi tanpa memerlukan sebarang kod QR sama sekali.

Langkah 3: Cara untuk menyahbekukan port nombor mudah alih yang tersekat (LNP Resolution Protocol)

Apabila anda menukar pembawa dan meminta untuk mengekalkan nombor telefon anda, pemindahan Nombor Tempatan (LNP) automatik antara rangkaian mudah alih biasanya selesai dalam 5 hingga 30 minit (atau 1 hari perniagaan di negara yang menggunakan kod PAC seperti UK). Jika pemindahan nombor anda tersekat selama lebih daripada 2 hingga 4 jam, atau jika anda mempunyai "Split Service" (panggilan keluar berfungsi, tetapi panggilan masuk berdering telefon lama anda dan teks SMS 2FA hilang), pesanan port anda berada dalam keadaan Konflik / Penyelesaian NPAC.

5 sebab tersembunyi port nombor membeku (dan cara mengosongkannya dalam masa 10 minit)

Hubungi "Pusat Pengalihan dan Pengaktifan" (PAC)** baharu anda yang baharu (mendapatkan)** dan bukannya sokongan pengebilan umum dan semak lima item ini:

  1. Anda membiarkan "Kunci Nombor / Pembekuan Port" dihidupkan pada pembawa lama:
  2. Pembawa menawarkan Kunci Pemindahan Nombor (Verizon Kunci Nombor, AT&T Kunci Akaun Wayarles, T-Mobile Perlindungan Port Keluar) untuk menghentikan pertukaran SIM. Jika aktif semasa anda menyerahkan permintaan port anda, pembawa lama menolak pemindahan secara automatik.
  3. Betulkan: Matikan MATIKAN Kunci Nombor dalam apl pembawa lama anda, tunggu 5 minit dan minta Jabatan Pengalihan pembawa baharu untuk menyerahkan semula permintaan.
  4. Anda membekalkan PIN Pengebilan Akaun 4 digit anda dan bukannya "PIN Pemindahan Nombor":
  5. Di Amerika Syarikat, peraturan FCC memerlukan 6 digit PIN Pindahan Nombor sementara (bukan PIN pengebilan 4 digit setiap hari anda) untuk membenarkan port-out:
    • Verizon: Dail #PORT (#7678) atau pergi ke Verizon Saya > Tetapan Akaun > PIN Pindahan Nombor.
    • AT&T: Dail *PORT (*7678) atau pergi ke myAT&T > Profile > People & Permissions > Transfer phone number.
    • T-Mobile: Buka apl T-Life -> Akaun > Tetapan Profil > Tetapan Talian > Minta PIN Pemindahan.
    • United Kingdom (EE, Vodafone, O2, Three): Teks PAC kepada 65075 daripada SIM lama anda untuk menerima Kod Kebenaran Pengalihan 9 aksara anda dalam masa 60 saat.
    • Kanada (Rogers, Bell, Telus): Simpan SIM lama anda sehingga anda membalas YES dalam masa 90 minit ke SMS pengesahan port-keluar CRTC mandatori.
  6. ZIP/Pos Pengebilan atau Tidak Padan Nombor Akaun:
  7. Pusat penjelasan NPAC membandingkan Nombor Akaun, PIN Pindahan dan Kod ZIP Pengebilan aksara demi aksara. Semak penjuru kanan sebelah atas bil bulanan PDF daripada pembawa lama anda untuk Nombor Akaun dan poskod yang tepat.
  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."

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 atau 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 kepada LTE (atau 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, atau 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

Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings (or Reset Mobile Network Settings on Android). This flushes corrupt carrier bundle caches without deleting your installed eSIM profiles.

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):
    • Turn ON Wi-Fi Calling (Settings > Cellular > [Home Line] > Wi-Fi Calling).
    • Go to Settings > Cellular > [Home Line] and toggle Data Roaming to OFF.
    • Optional Pro Step: Go to Settings > Cellular > [Home Line] > Network Selection, turn Automatic OFF, and manually select your Home Carrier (e.g., Verizon, AT&T, or T-Mobile).
  • When you land abroad:
    • Leave your Home Line turned ON, and also turn ON your Travel eSIM (setting Cellular Data -> Travel eSIM).
    • Because you locked your Home Line's Network Selection to your domestic carrier (which has no towers in the foreign country), your Home Line cannot connect to any foreign tower to trigger a daily roaming fee. Instead, iOS routes your Home Line over the Travel eSIM's cellular data connection ("[Home Carrier] using Cellular Data"), keeping your main phone number 100 percent active for iMessage, FaceTime, bank 2FA SMS texts, and Wi-Fi calling at zero roaming cost.

Prevention: Hardening your mobile account against SIM swaps and eSIM lockouts

Once your cellular service is restored, spend five minutes locking down your carrier account and device settings:

  • Enable "Number Lock / Port Freeze" in your carrier app: Turn on Number Lock (Verizon), Wireless Account Lock (AT&T), Port Out Protection / Takeover Protection (T-Mobile), or your carrier's equivalent port-out lock, and turn it off only for the 15 minutes when you intentionally switch carriers.
  • Convert physical nano-SIM cards to eSIM (or set a hardware SIM PIN): An eSIM is soldered onto your phone motherboard and cannot be popped out with a paperclip if your phone is lost or stolen. If you still use a physical SIM card, enable a SIM PIN (Settings > Cellular > SIM PIN) and change it immediately from the default carrier PIN (1111 atau 0000).
  • Tuliskan 32 digit anda EID dan 15 digit IMEI 1 / IMEI 2 luar talian: Dail *#06# pada telefon anda sekarang, tangkapan skrin atau tulis nombor EID dan IMEI anda, dan simpannya di dalam pengurus kata laluan supaya anda boleh mengenal pasti telefon anda kepada pembawa atau polis anda walaupun skrin pecah.
  • Pindahkan akaun kritikal daripada SMS 2FA: Gantikan pengesahan teks SMS pada e-mel, pengurus kata laluan dan akaun perbankan anda dengan apl pengesah TOTP yang disokong awan atau kunci keselamatan perkakasan FIDO2 (lihat kami Kunci keluar MFA dan pemulihan pengesah panduan).

Soalan lazim

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.

Panduan berkaitan

Sumber disemak

  • 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.