The Samsung Galaxy S25 is eSIM-capable, allowing users to forego physical SIM cards. Setting up an eSIM is done via the settings under "Connections" and "SIM Manager," where users can activate their eSIM by scanning a QR code or entering information manually. Setting up your BuddySIM eSIM is conveniently done by scanning a QR code.
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Your shop for worldwide eSIM data packages.
Technical details
Dual SIM
Physical SIM + eSIM (newer models: 2 active eSIMs)
eSIM profiles
Store up to 20 profiles, 1–2 active at once
Installation
QR code, activation link or manual code
Hotspot
Personal hotspot / tethering – share your data with laptop & tablet
Max. speed
5G & 4G/LTE – full network speed supported by device & network
SIM-unlocked
Requirement: device must be SIM/network unlocked (not tied to a carrier)
How to set up your eSIM
Install
Easily from home
1
Check compatibility & buy eSIM
Make sure your Samsung Galaxy S25 supports eSIM, and buy your eSIM in the BuddySIM shop.
2
Install eSIM
Settings → Connections → SIM manager → Add eSIM → enter the activation details from your email or scan the QR code.
The eSIM's mobile data only activates in your destination country — before that an error message may appear. That's normal, since the data is intended for your destination only.
Activate
Only in your destination
3
Enable data roaming & select line
In your destination, go to Settings → Connections → Mobile networks, turn on data roaming and select the BuddySIM eSIM as your line for mobile data — done, you are online.
BuddySIM app
Download the BuddySIM app
Manage your eSIM, keep an eye on your data and top up any time — right on your Samsung Galaxy S25. Free for iOS & Android.
Data calculator
How much data do you need?
Estimate your usage for your trip – and find the right plan for your Samsung Galaxy S25.
All values are estimates – actual usage depends on how you use your device. How much data do I need?
Frequently asked questions
What is an eSIM?
An eSIM (embedded SIM) is a digital SIM card already built into your smartphone. You no longer need to insert a physical SIM card – everything works digitally via QR code.
Can I use my regular SIM card at the same time?
Yes! Your Samsung Galaxy S25 supports dual SIM. You can use your regular SIM card alongside the eSIM – perfect for travelling or to separate personal and business numbers.
How long does activation take?
The eSIM is activated within seconds. Right after purchase you receive the QR code by email and can scan and use it immediately.
Does BuddySIM work worldwide?
Yes, BuddySIM offers eSIM data plans for over 190 countries worldwide. Just choose your destination and stay connected anywhere.
Do I need a new number?
No! BuddySIM eSIMs are data-only plans. You keep your existing number on your physical SIM card and use the eSIM just for mobile internet.
Your Samsung Galaxy S25 can store up to 20 eSIM profiles depending on the model. Usually one eSIM is active at a time (together with a physical SIM); newer models like the Galaxy S23 or Z Fold5 support two active eSIMs.
Ready to go instantly
The eSIM QR code arrives by email – scan, activate, go!
Need help?
Our support team is available around the clock via WhatsApp.
