如何在 iPhone 上啟用 eSIM｜完整教學與設定指南（含 ICCID、APN、QR Code）

How to Activate eSIM on iPhone: Complete Setup Guide (ICCID, APN, QR Code Explained)

New to eSIMs? This step-by-step tutorial shows you exactly how to activate your eSIM on iPhone — from scanning your QR code and locating the ICCID, to setting your APN for stable mobile data. You can install your eSIM at home while connected to Wi-Fi and simply enable data & roaming when you arrive at your destination. Most eSIM plans remain valid for 90 days after purchase.

Quick Start: 3 Steps Before You Travel

  1. Check if your iPhone supports eSIM: Dial *#06#. If you see an EID number, your device supports eSIM. You can also check the compatible device list.
  2. Purchase and confirm your email: After checkout, you'll receive an email with your QR Code, ICCID, and installation details.
  3. Install your eSIM at home: Connect to Wi-Fi and finish installation before your trip. Turn on data and roaming only when you arrive.

See the full visual guide here: eSIM Activation Guide.

What Are ICCID and APN — and Why They Matter

  • ICCID: Also known as the SIM number. It’s a unique code identifying your eSIM profile. Some manual setups require entering this number.
  • APN (Access Point Name): Defines how your phone connects to the internet. Most eSIMs auto-configure, but if you can’t connect, you may need to enter the APN manually.
eSIM APN settings example
Manual APN settings example — follow your eSIM provider’s instructions if data connection fails.

How to Activate eSIM on iPhone (With Video Tutorial)

Option A: Scan the QR Code (Recommended)

  1. Connect to Wi-Fi.
  2. Go to Settings ▸ Cellular (or Mobile Data) ▸ Add eSIM.
  3. Select “Use QR Code” and scan the code from your activation email.
  4. Follow on-screen prompts and set this eSIM as your primary cellular data line.
  5. Keep “Data Roaming” turned off until you arrive at your destination.

Option B: Enter Details Manually (If QR Code Not Available)

  1. Go to Settings ▸ Cellular ▸ Add eSIM.
  2. Select “Enter Details Manually”.
  3. Enter your SM-DP+ address, Activation Code, and ICCID if required.
  4. Set this eSIM as your primary data plan.
Video tutorial: How to install and activate an eSIM on iPhone.

After Arrival: Enable Data and Roaming

  1. Open Settings ▸ Cellular and make sure your eSIM is activated.
  2. Turn on Cellular Data and Data Roaming.
  3. Wait a few seconds — your phone should automatically connect to 4G or 5G.
  4. If no signal, restart your phone or wait up to 30 minutes for network registration.

Troubleshooting Common Issues

  • No internet / only 3G: Go to Settings ▸ Cellular ▸ Cellular Data Options ▸ Cellular Data Network and manually input your APN details.
  • Can’t scan QR code: Use the manual entry option with SM-DP+ / Activation Code / ICCID.
  • Messages not sending: Check your default line for iMessage, WhatsApp, or FaceTime.
  • Hotspot not working: Most eSIMs support personal hotspot (depends on region and carrier).
  • Deleted eSIM by mistake: eSIMs are one-time downloads. Contact support for re-issue if available.

Purchase Timing and Activation Window

  • Buy early: Purchase your eSIM 1–2 weeks before travel; install 1–3 days before departure.
  • Activation period: Most plans can be activated within 90 days of purchase.

Ready to activate your eSIM?
Open eSIM Activation Guide Check Compatible Devices

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Written by eSIMKitStore ｜ This guide applies to most eSIM-compatible iPhone models. Menu names may vary slightly depending on your iOS version.

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