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Upgrading to a new smartphone or switching devices mid-journey is exciting—until you realize your mobile data plan is tied to an embedded chip.

If you are asking: “Can I switch or transfer my eSIM to another phone?”

The short answer is: Yes, but it strictly depends on your specific plan’s profile configuration and following exact operational steps.

Unlike physical SIM cards that can be swapped mechanically, an eSIM is a cryptographically secured profile stored inside your device’s eUICC chip. In this definitive guide, we break down the underlying mechanics, which plans can be transferred, and how to safely move your Billion Connect eSIM without losing your data.

1. Carrier eSIM vs. Travel eSIM: Understanding the Architectural Difference

Most online guides cause confusion because they treat all eSIMs the same. In reality, mobile connectivity operates across two distinct architectures:

Feature	Primary Carrier eSIM (MNO)	Standard Travel eSIM (Market Default)	Billion Connect Flexible eSIM
Typical Issuer	AT&T, Verizon, T-Mobile, NTT Docomo, etc.	Most international roaming providers	Billion Connect
Apple Quick Transfer	Supported (via Carrier Entitlement)	Not Supported	Not Supported (Manual Transfer Only)
Transferability	Cloud/Account Sync	Strictly One-Time Installation	Transferable on Supported Plans (Up to 2 times)
Transfer Method	Bluetooth / Cloud push	Cannot be moved	Delete on old device (Over Wi-Fi) → Rescan QR on new device

2. The Core Rules of Billion Connect eSIM Transfer

Unlike many travel eSIM providers that permanently lock your package to a single device upon first installation, most Billion Connect plans offer flexible re-installation. However, you must observe three non-negotiable rules:

Rule 1: Verify Single-Use Restrictions First

Check your product page or order confirmation email. If your plan explicitly states “This eSIM can only be installed once,” the cryptographic profile is locked to that initial hardware. Do not delete it under any circumstances—deletion results in permanent cancellation.

Rule 2: Strictly One Active Device at a Time

An eSIM profile cannot function concurrently on two phones. You must completely release the profile on your old phone before the Remote SIM Provisioning (SM-DP+) server permits installation on the target device.

Rule 3: Re-installation Limit

For plans that support transfer, re-installation is not indefinite. You can transfer and re-scan your original QR code a maximum of 2 times.

3. Step-by-Step: How to Safely Transfer Your eSIM

Follow these precise steps to avoid invalidating your profile:

Step 1: Connect Old Phone to Stable Wi-Fi (Crucial)

Your old phone must have an active internet connection (Wi-Fi) when you delete the eSIM.

• Why this matters: When an eSIM profile is deleted online, your phone sends a cryptographically signed DeleteNotification to the provisioning server (SM-DP+). This unbinds the ICCID from the old device’s EID. If you delete the profile offline, the server still registers the profile as active, and the new device will reject the QR code as “Already in Use”.

Step 2: Remove the eSIM Profile from the Old Device

• On iPhone: Go to Settings → Cellular / Mobile Service → Tap your travel eSIM → Select Delete eSIM (or Remove Cellular Plan).
• On Android (Samsung/Pixel): Go to Settings → Connections / Network & internet → SIM manager → Tap the eSIM → Tap Remove / Delete.

Step 3: Scan the Original QR Code on the New Phone

• Open Camera or go to Settings → Cellular → Add eSIM → Use QR Code on your new phone.
• Scan the original QR code received in your confirmation email or order dashboard.
• Complete the setup prompts and turn on Data Roaming upon arrival at your destination.

4. Critical Travel Warning: “Turn OFF”, Never “Delete”

If you are experiencing slow speeds, poor signal, or simply want to conserve battery or data:

• DO NOT delete the eSIM profile.
• DO go to Settings and toggle the eSIM line to “OFF”.

Toggling an eSIM off keeps the encryption profile intact on your device’s chip while cutting network transmission. Deleting a non-transferable plan erases the profile irrevocably, requiring a repurchase.

5. Frequently Asked Questions (FAQ)

Q1: Can I use Apple’s “Quick Transfer” (Nearby iPhone) for my travel eSIM?

No. Apple Quick Transfer requires direct operator integration with proprietary carrier servers. Travel eSIMs from international roaming providers must be transferred manually via the Delete (online) → Rescan QR Code workflow.

Q2: What happens if I lost or broke my old phone?

Because the profile cannot send an online release notification from the lost phone, simple rescanning will fail. You must contact Billion Connect 24/7 Customer Support with your Order Number and ICCID to request a backend profile reset or reissue.

Q3: Can I transfer my eSIM between different operating systems (e.g., from iPhone to Android, or vice versa)?

Yes. Because Billion Connect’s transfer process uses manual remote provisioning (SM-DP+) via QR code rather than proprietary OS-level ecosystems, the mobile platform does not matter. As long as your plan supports re-installation, you can switch between iPhone and Android following the standard Delete over Wi-Fi → Scan QR Code steps.

Q4: Does transferring an eSIM to a new phone pause or reset my package validity / data allowance?

No. Your plan’s validity clock and consumed data are tracked on the carrier’s server, not locally on your hardware. Moving your eSIM to another device does not pause the remaining days, extend your expiration date, or reset your high-speed data balance.

Q5: Can I scan the QR code on my new phone first before deleting it from my old device?

No. An eSIM profile can strictly reside on only one device at a time. Scanning the QR code on your new device while the eSIM is still active on your old phone will result in an immediate rejection error such as “Code no longer valid” or “Profile already downloaded”.

Q6: What should I do if I accidentally deleted my eSIM while offline (without Wi-Fi)?

If you removed the profile without an active internet connection, your old phone was unable to send the DeleteNotification receipt to the server. If your new device fails to scan the QR code, contact Billion Connect Customer Support with your Order Number and ICCID for backend assistance.

Q7: If my travel eSIM includes a local phone number (e.g., Thailand AIS), will I lose the number after transferring?

No. The assigned phone number, incoming call functions, and any preloaded airtime balance are bound directly to your eSIM profile’s ICCID, not your physical handset. Once reinstalled on your new phone, your number and remaining balance will remain intact.

Q8: Can I transfer my eSIM while already abroad at my destination?

Yes. You can transfer your eSIM at any point during your trip, provided you have access to a stable external connection (such as hotel or airport Wi-Fi) on both devices to handle profile deletion and subsequent download.

Q9: Does Billion Connect charge any transfer fees?

No. Moving your supported Billion Connect eSIM to a new phone is 100% free of charge, as long as your plan allows re-installation and you remain within the standard 2-transfer limit.