iPhone 15 Series

The iPhone 15 series — iPhone 15, 15 Plus, 15 Pro, and 15 Pro Max — all support eSIM. US models from September 2023 have no physical SIM card slot and rely entirely on eSIM.

Key Takeaways

• All four iPhone 15 models support eSIM.
• US models are eSIM-only — no nano-SIM tray.
• Dual eSIM: run your home number and a travel eSIM simultaneously.
• Carrier unlock is required to use Roamix or any non-carrier eSIM.

Does the iPhone 15 Support eSIM?

Yes. Every iPhone 15 model supports eSIM. The iPhone 15, 15 Plus, 15 Pro, and 15 Pro Max all ship with eSIM capability. US models purchased from September 2023 have no physical SIM tray — eSIM is your only cellular connectivity option.

International iPhone 15 models (purchased outside the US) include both a nano-SIM slot and eSIM support, allowing one eSIM plus one physical SIM to be active simultaneously.

iPhone 15 Models and eSIM Compatibility

How to Activate eSIM on iPhone 15

1. Open Settings.
2. Tap Cellular, then tap Add Cellular Plan.
3. Scan the QR code from your eSIM provider. Roamix emails the QR code within 60 seconds of payment.
4. Give the line a label (e.g., "Roamix Travel").
5. Set the Roamix line as your cellular data line when prompted.
6. Leave your home carrier active for calls and texts.

Using Two Lines on iPhone 15

iPhone 15 supports Dual eSIM — two active lines at the same time. For international travel, the most common setup is:

• Home carrier line: Handles calls, iMessage, and banking SMS codes. Data roaming turned off.
• Roamix eSIM: Set as the cellular data line. Data roaming turned on (required for travel eSIMs that use partner networks).

Navigate to Settings → Cellular → Cellular Data to assign which line handles data. Configure each line's roaming individually by tapping the line name.

iPhone 15 eSIM for International Travel

A Roamix eSIM lets your iPhone 15 connect to local partner networks in 190+ countries without paying your carrier's international day pass rates. Purchase before departure, scan the QR code over Wi-Fi, and your phone is ready to connect when you land.

Top up directly from your Roamix dashboard if you need more data mid-trip.

Unlock check: Go to Settings → General → About → Carrier Lock. If it says anything other than "No SIM restrictions," your iPhone is carrier-locked and needs to be unlocked before a third-party eSIM will work.

iPhone 15 eSIM Troubleshooting

"esim not working" after installation: Confirm the Roamix line is selected at Settings → Cellular → Cellular Data. Verify Data Roaming is on for the Roamix line. Toggle Airplane Mode on for 15 seconds then off.

Can't scan the QR code: Hold the camera 6–8 inches from the code in good light. Alternatively tap Enter Details Manually and use the SM-DP+ address from your confirmation email.

eSIM not compatible error: Almost always caused by a carrier lock, not a hardware limitation. Check Carrier Lock status in Settings and contact your carrier to unlock.

How to install eSIM on iPhone 15 without a QR code: Some providers support manual activation. Tap Enter Details Manually at the Add Cellular Plan screen and enter the SM-DP+ server address and activation code that your provider supplies.

Using Quick eSIM Transfer to move Roamix to a new iPhone 15: iPhone 15 supports Quick eSIM Transfer, which lets you move eSIM profiles directly to a new iPhone during device setup via Bluetooth. Note: this depends on the eSIM provider allowing transfers. Roamix eSIMs use QR-code activation — if you get a new device, contact Roamix for a replacement QR code rather than relying on Quick Transfer.