What Is Dual SIM with eSIM
Dual SIM means running two SIM cards simultaneously in a single device. In modern smartphones, one of those "slots" can be virtual — that's the eSIM. The result: you keep your home physical SIM for calls and texts while a travel eSIM handles local data abroad. One phone, two numbers, no swapping cards.
Which Devices Support Dual SIM with eSIM
iPhone: All models from iPhone XS (2018) onward support physical SIM + eSIM simultaneously. iPhone 14 and later (US versions) go further — they support Dual eSIM with no physical SIM slot at all.
Android: Most flagships support it — Samsung Galaxy (S21 and newer), Google Pixel (3a and newer), Sony Xperia, Motorola Edge, and others. Budget models often don't include eSIM support; always check the spec sheet.
Huawei and Honor: Most current models don't support eSIM due to sanctions-related restrictions.
How It Works in Practice
With two active SIMs, your device lets you:
- Two numbers: receive calls on both numbers simultaneously
- Choose SIM for outgoing calls: configure which card to use for calls and SMS
- Choose SIM for data: assign one SIM as the primary internet source
The classic traveler setup: physical SIM stays as your home number (calls and SMS), eSIM provides local data without roaming charges.
How to Configure Dual SIM
iOS (iPhone):
- Install the eSIM: Settings → Cellular → Add Cellular Plan
- Assign labels: "Primary" and "Travel"
- Settings → Cellular → Cellular Data → select your eSIM
- Settings → Cellular → your eSIM plan → Data Roaming → On
Android (Samsung / Pixel):
- Settings → Network → SIM cards → Add eSIM
- Follow the carrier's installation instructions
- Under SIM cards, set preferences for mobile data, calls, and SMS per SIM
Limitations to Keep in Mind
- Maximum of two simultaneous SIMs (physical + eSIM, or two eSIMs)
- Only one SIM can be the active data source at any moment
- Some iPhone variants (certain country models) support Dual eSIM only, with no physical SIM slot
Frequently Asked Questions
Will I receive calls on my home number while using a travel eSIM abroad? Yes, as long as your physical SIM is active and your home carrier supports roaming. Note that incoming roaming calls may be billed by your home carrier.
Can I switch the data SIM on the fly? Yes — instantly via quick settings on Android or Settings → Cellular on iOS.
Do I need to remove my physical SIM when using an eSIM? No. Both run at the same time. No card swapping needed.
Want to use a travel eSIM alongside your regular SIM card? Find eSIM plans for any destination on Marix — buy before you travel, activate mid-flight.