Does the Samsung Galaxy S21 work with an eSIM from our app?

Yes: the Samsung Galaxy S21 is fully compatible with eSIM and works perfectly with our app that sells eSIMs. You can download, purchase, and install your eSIM directly through the app.

Can I use both a physical nano-SIM and an eSIM on the Samsung Galaxy S21?

Yes, if your carrier and model allow it. the Samsung Galaxy S21 supports the "nano-SIM + eSIM" (Dual SIM) configuration in many countries. This allows you to keep your primary number while adding an eSIM, for example for travel.

Do I need to activate the eSIM immediately after purchase?

The validity period of an eSIM depends on the plan chosen and the activation method. In general, it begins when you first connect to the local operator's network. To ensure a smooth trip, we recommend activating your eSIM one week in advance. This will allow you to verify that everything is working properly and avoid any unexpected issues.

How many eSIMs can be activated on the Samsung Galaxy S21?

You can activate up to 2 eSIMss on the Samsung Galaxy S21. However, it can store up to 3 eSIM profiles.

How can I check if my Samsung Galaxy S21 is ready for an eSIM?

Go to your Samsung Galaxy S21 in Settings → Network & Internet → SIM & mobile network → Add an eSIM plan. If this option appears, your Samsung Galaxy S21 is eSIM compatible. If not, check that your Android version is up to date and that your device is unlocked.

Can I use an eSIM when traveling abroad with the Samsung Galaxy S21?

Yes: the Samsung Galaxy S21 is fully compatible with travel eSIMs. Buy an eSIM for your destination from our app , activate it before departure and keep your main SIM active: you use mobile data abroad without roaming charges while keeping your number.

Can I transfer my travel eSIM to another Samsung Galaxy S21?

No: travel eSIMs are linked to the device on which they have been installed. Once activated on the Samsung Galaxy S21, an eSIM cannot be moved to another phone. If you change handset, you will need to purchase a new eSIM for your new phone.

Is an eSIM more secure than a physical SIM card?

Yes: unlike a physical SIM, an eSIM cannot be removed or cloned in the event of theft. Its activation requires cryptographic authentication with the operator, and the data is stored in a secure chip embedded in the Samsung Galaxy S21, making SIM swapping attacks considerably more difficult.

Can I keep my phone number with an eSIM?

Yes, if you switch to an eSIM with your main operator, your number is retained: your operator provides you with a QR code to scan from the the Samsung Galaxy S21 settings. Travel eSIMs in our application do not contain a phone number: they are used for mobile data only, and complement your main line.

What happens if I lose the Samsung Galaxy S21 with an eSIM installed?

The eSIM remains associated with the lost device and cannot be transferred. Block your phone and contact your operator to suspend your main line. For a travel eSIM purchased via our application, contact our customer support team, who will examine your situation on a case-by-case basis.

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Everything you need to know about the Samsung Galaxy S21: eSIM compatibility by region (US, Europe, China, Japan), model numbers, Dual SIM configurations, and step-by-step instructions for activating your travel eSIM without roaming charges.

Compatible models

Samsung Galaxy S21 5G
Samsung Galaxy S21+ 5G
Samsung Galaxy S21 Ultra 5G
Samsung Galaxy S21+ Ultra 5G

Does Samsung Galaxy S21 Support eSIM?

Yes, the Samsung Galaxy S21 has supported eSIM technology natively since its release in 2021. You can activate up to 2 eSIMs simultaneously and store 3 profiles on the device, making it ideal for combining your primary line with a travel eSIM without replacing your physical SIM card.

Specifications

eSIMs that can be activated simultaneously

storable eSIM profiles

2021

Year of release

Use an eSIM while keeping a physical nano-SIM (Dual SIM depending on operator).

Travel or switch carriers easily without replacing your SIM card.

Find an eSIM for your next destination

What should you do before installing an eSIM on your Samsung Galaxy S21?

Before installing an eSIM on your Samsung Galaxy S21, check these important points:

1
The Samsung Galaxy S21 is unlocked (unlocked for all carriers).
2
Your model is not a specific "Mainland China" model (eSIM restrictions may apply).
3
Your Android version is up to date (Android 12+ minimum) to ensure maximum compatibility.
4
Install the eSIM via our app, which guides you step by step.
5
Activate your eSIM with an Internet connection (Wi-Fi or data) to avoid any blockages.