Frequently Asked Questions
About eSIMs forJapan

• What is a Japan eSIM?

  "A Japan eSIM (embedded SIM) is a digital SIM card that gives you instant mobile data access when traveling in Japan - no physical card, no store visit, no SIM swapping required.

  Unlike a traditional SIM, an eSIM is a small chip built directly into your phone. It stores your carrier’s information digitally, and you can activate it in minutes by simply scanning a QR code.

  With Commbitz Japan eSIM: • Purchase your plan online in seconds • Receive a QR code instantly via email • Scan to install - stay connected the moment you land in Japan"

  A Japan eSIM (embedded SIM) is a digital SIM card that gives you instant mobile data access when traveling in Japan - no physical card, no store visit, no SIM swapping required.
  
  Unlike a traditional SIM, an eSIM is a small chip built directly into your phone. It stores your carrier's information digitally, and you can activate it in minutes by simply scanning a QR code.
  
  With Commbitz Japan eSIM:
  • Purchase your plan online in seconds
  • Receive a QR code instantly via email
  • Scan to install - stay connected the moment you land in Japan
• How does an eSIM work?

  "An eSIM works by digitally storing your carrier’s profile directly on a chip inside your device - eliminating the need for a physical SIM card.

  Here’s the process:

  1. You purchase a Japan eSIM plan on Commbitz.com
  2. A QR code is sent to your email
  3. You scan the QR code - your phone downloads the carrier profile
  4. The eSIM activates automatically when your phone connects to a network in Japan

  The eSIM standard is developed by GSMA and supported worldwide. It allows your device to switch between carriers without ever touching a physical card. You can even store multiple eSIM profiles and switch between them."

  An eSIM works by digitally storing your carrier's profile directly on a chip inside your device - eliminating the need for a physical SIM card.
  
  Here's the process:
  1. You purchase a Japan eSIM plan on Commbitz.com
  2. A QR code is sent to your email
  3. You scan the QR code - your phone downloads the carrier profile
  4. The eSIM activates automatically when your phone connects to a network in Japan
  
  The eSIM standard is developed by GSMA and supported worldwide. It allows your device to switch between carriers without ever touching a physical card. You can even store multiple eSIM profiles and switch between them.
• How do I check if my phone supports eSIM?

  "The fastest way to check eSIM compatibility:

  Dial *#06# and press call If you see an EID number (a long digital ID), your phone supports eSIM

  Alternatively: • iPhone: Go to Settings → General → About → scroll down to find ‘EID’ • Android / Samsung: Settings → About Phone → Status → EID

  Compatible devices include: • iPhone XS, XR, and all newer models (iPhone 11 through 16 series) • Samsung Galaxy S20 and newer, Z Fold, Z Flip series • Google Pixel 3a and all newer Pixel models • Most Android smartphones released from 2020 onward

  Tip: If you see ‘Add eSIM’ or ‘Add Data Plan’ in your Mobile Data settings, your device is eSIM-ready."

  The fastest way to check eSIM compatibility:
  
  Dial *#06# and press call
  If you see an EID number (a long digital ID), your phone supports eSIM
  
  Alternatively:
  • iPhone: Go to Settings → General → About → scroll down to find 'EID'
  • Android / Samsung: Settings → About Phone → Status → EID
  
  Compatible devices include:
  • iPhone XS, XR, and all newer models (iPhone 11 through 16 series)
  • Samsung Galaxy S20 and newer, Z Fold, Z Flip series
  • Google Pixel 3a and all newer Pixel models
  • Most Android smartphones released from 2020 onward
  
  Tip: If you see 'Add eSIM' or 'Add Data Plan' in your Mobile Data settings, your device is eSIM-ready.
• How do I activate my Japan eSIM after purchase?

  "Activating your Commbitz Japan eSIM is simple and takes under 5 minutes:

  Step 1: Purchase your Japan eSIM plan on Commbitz.com Step 2: Receive your QR code instantly via email (arrives within seconds) Step 3: Open your phone’s settings: • iPhone: Settings → Mobile Data → Add Data Plan → scan QR code • Samsung/Android: Settings → Connections → SIM Manager → Add eSIM → scan QR code Step 4: Your phone downloads the eSIM profile automatically Step 5: Enable the eSIM when you land in Japan - your data activates on its own

  You do not need to be in Japan to install the eSIM. Scan and install it before your trip so you are connected the moment you arrive."

  Activating your Commbitz Japan eSIM is simple and takes under 5 minutes:
  
  Step 1: Purchase your Japan eSIM plan on Commbitz.com
  Step 2: Receive your QR code instantly via email (arrives within seconds)
  Step 3: Open your phone's settings:
  • iPhone: Settings → Mobile Data → Add Data Plan → scan QR code
  • Samsung/Android: Settings → Connections → SIM Manager → Add eSIM → scan QR code
  Step 4: Your phone downloads the eSIM profile automatically
  Step 5: Enable the eSIM when you land in Japan - your data activates on its own
  
  You do not need to be in Japan to install the eSIM. Scan and install it before your trip so you are connected the moment you arrive.
• When should I install my Japan eSIM - before or after I arrive?

  "We recommend installing your Japan eSIM before you leave home.

  Why install early: • You need a stable Wi-Fi or data connection to download the eSIM profile • Installing at home means you land in Japan already connected - no airport Wi-Fi hunting • You can troubleshoot any issues from home rather than at the airport

  Does early installation waste data? No - the Japan eSIM data plan only starts counting when you first use data in Japan. Installing the eSIM in advance does not consume your allowance.

  What if I haven’t installed before landing? Most major airports in Japan have free Wi-Fi - you can install immediately after landing. The process takes under 2 minutes."

  We recommend installing your Japan eSIM before you leave home.
  
  Why install early:
  • You need a stable Wi-Fi or data connection to download the eSIM profile
  • Installing at home means you land in Japan already connected - no airport Wi-Fi hunting
  • You can troubleshoot any issues from home rather than at the airport
  
  Does early installation waste data?
  No - the Japan eSIM data plan only starts counting when you first use data in Japan. Installing the eSIM in advance does not consume your allowance.
  
  What if I haven't installed before landing?
  Most major airports in Japan have free Wi-Fi - you can install immediately after landing. The process takes under 2 minutes.
• Will I lose my home phone number when I use a Japan eSIM?

  "No - your home SIM card and phone number remain completely active alongside your Commbitz Japan eSIM.

  An eSIM works as a second line on your device (dual SIM). Your setup will be: • Home SIM: active for calls, texts, and as your regular number • Commbitz Japan eSIM: active for mobile data in Japan

  To avoid accidental roaming charges: → Set Japan eSIM as default for ‘Mobile Data’ → Keep your home SIM set to ‘Voice & SMS’ only → Turn off ‘Data Roaming’ on your home SIM in settings

  This way you continue receiving calls on your home number while using fast local eSIM data - with zero roaming charges on your home plan."

  No - your home SIM card and phone number remain completely active alongside your Commbitz Japan eSIM.
  
  An eSIM works as a second line on your device (dual SIM). Your setup will be:
  • Home SIM: active for calls, texts, and as your regular number
  • Commbitz Japan eSIM: active for mobile data in Japan
  
  To avoid accidental roaming charges:
  → Set Japan eSIM as default for 'Mobile Data'
  → Keep your home SIM set to 'Voice & SMS' only
  → Turn off 'Data Roaming' on your home SIM in settings
  
  This way you continue receiving calls on your home number while using fast local eSIM data - with zero roaming charges on your home plan.
• How much do Japan eSIM plans cost, and what's included?

  "Commbitz Japan eSIM plans are fully prepaid - no hidden charges, no monthly billing, no roaming surprises.

  Plans are available in different tiers based on your trip length and data needs: • Short trips (1–3 days): Starter data plans • Standard trips (5–14 days): Mid-range data bundles (5–15 GB) • Long stays / heavy users (15–30 days): High-data or unlimited plans

  All plans include: ✓ Prepaid data (no surprise bills) ✓ 5G / 4G LTE speeds on top local networks ✓ Instant QR code delivery by email ✓ Hotspot / tethering support (most plans)

  Check current plan pricing and availability on the Commbitz Japan eSIM page - prices vary by destination and data volume."

  Commbitz Japan eSIM plans are fully prepaid - no hidden charges, no monthly billing, no roaming surprises.
  
  Plans are available in different tiers based on your trip length and data needs:
  • Short trips (1–3 days): Starter data plans
  • Standard trips (5–14 days): Mid-range data bundles (5–15 GB)
  • Long stays / heavy users (15–30 days): High-data or unlimited plans
  
  All plans include:
  ✓ Prepaid data (no surprise bills)
  ✓ 5G / 4G LTE speeds on top local networks
  ✓ Instant QR code delivery by email
  ✓ Hotspot / tethering support (most plans)
  
  Check current plan pricing and availability on the Commbitz Japan eSIM page - prices vary by destination and data volume.