iPhone 16 Series

The iPhone 16 series — iPhone 16, 16 Plus, 16 Pro, and 16 Pro Max — all support eSIM. If you purchased your phone in the United States, it is eSIM-only with no physical SIM card slot.

Key Takeaways

• All iPhone 16 models support eSIM.
• US models are eSIM-only — no physical SIM tray is present.
• Dual eSIM lets you run two lines at once (home + travel).
• Your iPhone must be carrier-unlocked to use Roamix or any third-party eSIM.

Does the iPhone 16 Support eSIM?

Yes. Every iPhone 16 model — iPhone 16, 16 Plus, 16 Pro, and 16 Pro Max — supports eSIM. US models are eSIM-only: there is no physical nano-SIM tray. International models (purchased outside the US) include a nano-SIM slot alongside eSIM capability.

The iPhone 16 supports Dual eSIM, meaning you can have two active cellular lines at the same time. This is the standard configuration for travelers who want to keep their US number active while running a separate data-only eSIM abroad.

iPhone 16 Models and eSIM Compatibility

All four iPhone 16 models have identical eSIM capabilities. The difference between Pro and standard models is in the chip, display, and camera — not eSIM support.

How to Activate eSIM on iPhone 16

1. Open Settings.
2. Tap Cellular, then tap Add Cellular Plan.
3. Point your camera at the QR code from your eSIM provider. Roamix delivers the QR code by email within 60 seconds of payment.
4. Give the new line a label — "Roamix Travel" works well.
5. When asked which line to use for cellular data, select your travel eSIM.
6. Keep your home carrier line enabled for calls and texts.

That is the complete process. Your Roamix eSIM connects automatically when you arrive in the destination country.

Using Two Lines on iPhone 16

iPhone 16 supports Dual eSIM: two lines active at the same time. A typical travel setup keeps your US carrier line for calls and iMessage while the Roamix eSIM handles data abroad.

To configure this:

1. Go to Settings → Cellular → Cellular Data.
2. Select the Roamix line as your data line.
3. Go back and tap your home carrier line, then tap Cellular Data Options.
4. Turn Data Roaming off for your home line to avoid accidental roaming charges.
5. On the Roamix line, turn Data Roaming on — travel eSIMs use partner networks and require roaming to be enabled.

iPhone 16 eSIM for International Travel

iPhone 16 and Roamix are a straightforward combination for international travel. Purchase a plan at roamix.app, scan the QR code over Wi-Fi before you leave, and your phone connects to a local partner network when you arrive.

You can top up directly from your account dashboard without reinstalling the eSIM.

Carrier unlock is required. If your iPhone 16 was purchased from a US carrier on a payment plan or promotional deal, it may be carrier-locked. Go to Settings → General → About → Carrier Lock. If the field shows your carrier name rather than "No SIM restrictions," contact your carrier to request an unlock.

iPhone 16 eSIM Troubleshooting

"Add Cellular Plan" option is missing: This typically means the iPhone is carrier-locked. Verify at Settings → General → About → Carrier Lock and contact your carrier if locked.

QR code not scanning: Ensure a stable Wi-Fi connection, then hold the phone 6–8 inches from the code with good lighting. As a fallback, tap Enter Details Manually and use the SM-DP+ address from your Roamix confirmation email.

eSIM installed but no signal abroad: Go to Settings → Cellular and confirm the Roamix line is selected as the data line. Toggle Data Roaming on for the Roamix line specifically. Toggle Airplane Mode on for 15 seconds, then back off to force a network search.

"esim not compatible" error: This usually indicates the phone is carrier-locked, not that the device is incompatible. Check Carrier Lock status and contact your carrier.