Does the Samsung Galaxy S25 Support eSIM?
Yes — all four Samsung Galaxy S25 models (S25, S25+, S25 Edge, and S25 Ultra) support eSIM and dual SIM (one physical nano-SIM plus one eSIM) on UK-sold handsets. This guide walks you through activating an eSIM on any S25 variant, troubleshooting common issues, and choosing the right plan to get the most from your hardware.
What You'll Need Before You Start
Before diving into the steps, make sure you have the following ready:
- A Samsung Galaxy S25, S25+, S25 Edge, or S25 Ultra running One UI 7 or later
- An unlocked handset (more on carrier locks below)
- A stable Wi-Fi connection
- Your Fuse eSIM QR code — you'll receive this by email after signing up at Fuse Mobile
- A few minutes of uninterrupted time
Tip: You don't need to remove your existing physical SIM to add an eSIM. The S25 supports both simultaneously, so you can run them side by side.
How to Set Up eSIM on Samsung Galaxy S25: Step-by-Step
Step 1: Open SIM Manager
- On your S25, open Settings
- Tap Connections
- Tap SIM Manager
You'll see your current SIM cards listed here. If you have a physical SIM inserted, it will appear as SIM 1.
Step 2: Add Your eSIM
- Tap Add eSIM (or Add mobile plan, depending on your One UI version)
- Select Scan QR code
- Point your camera at the Fuse QR code from your activation email
- The S25 will read the code and display a confirmation screen showing the eSIM details
- Tap Confirm or Add to proceed
No QR code to hand? You can also enter the activation code manually. Tap Enter activation code instead of scanning, then type in the code from your email.
Step 3: Wait for Activation
Your S25 will now download and install the eSIM profile. This typically takes 15–60 seconds on a good Wi-Fi connection. You'll see a progress indicator on screen. Don't lock the phone or switch apps during this step.
Once complete, the Fuse eSIM will appear in SIM Manager as a second SIM.
Step 4: Name Your eSIM
- In SIM Manager, tap on the newly added eSIM
- Tap SIM name and give it something recognisable — "Fuse" works well
- Choose a colour label if you like (useful for distinguishing SIMs in notifications)
- Tap Save
Step 5: Set Fuse as Your Primary Data SIM
- Still in SIM Manager, tap Mobile data
- Select your Fuse eSIM from the list
- Tap Apply if prompted
Your S25 will now route all mobile data through Fuse. Calls and texts can stay on your physical SIM if you prefer — Samsung's dual SIM setup lets you assign each function independently.
Step 6: Configure Dual SIM Settings (Optional)
If you're keeping a physical SIM alongside your Fuse eSIM:
- In SIM Manager, tap Calls and choose which SIM handles outgoing calls — or select Ask every time to choose per call
- Tap Text messages and set your preferred SIM for SMS
- Tap Mobile data and confirm Fuse is selected
This is particularly useful if you're keeping a legacy SIM for a specific number while using Fuse for all data.
Why Your eSIM Option Might Not Be Showing
If you navigate to Settings > Connections > SIM Manager and can't see an Add eSIM option, here are the most common causes and fixes.
Carrier-Locked Handset
This is the most frequent culprit. If you bought your S25 directly from a network on a contract, it may be locked to that carrier — and a locked Samsung phone will hide or disable the eSIM option for other providers.
How to check: Go to Settings > Connections > Mobile networks > Network operators and tap Search now. If you only see one network or get an error, your handset may be locked.
The fix: Contact the network you bought the phone from and request an unlock. UK networks are legally required to unlock handsets on request, though some charge a small fee or require you to have completed a minimum term. Once unlocked, restart your S25 and the eSIM option should reappear.
Software Is Out of Date
eSIM management on Samsung devices requires One UI 7 or later on the S25. An outdated software version can cause the Add eSIM option to disappear or behave unexpectedly.
Four UK networks, one eSIM. No contract.
Get connected to all four UK networks and never worry about signal again.
The fix:
- Go to Settings > Software update
- Tap Download and install
- Install any pending updates and restart your phone
eSIM Profile Limit Reached
Samsung Galaxy S25 models can store multiple eSIM profiles, but only one can be active at a time alongside a physical SIM. If you've previously added eSIMs that are still stored on the device, you may need to delete an old profile before adding a new one.
The fix: In SIM Manager, tap an existing eSIM profile and select Delete eSIM. Then try adding your Fuse eSIM again.
Region or Model Variant
A small number of S25 units sold in certain markets (notably some US carrier variants) ship without eSIM support entirely. UK-purchased S25 models all support eSIM — but if you've imported your handset, verify the model number. UK variants are SM-S931B (S25), SM-S936B (S25+), SM-S937B (S25 Edge), and SM-S938B (S25 Ultra).
Why Fuse Is the Best eSIM for the Samsung Galaxy S25
The Galaxy S25 is one of the most capable smartphones on the market — Snapdragon 8 Elite chipset, excellent antenna design, and seamless multi-SIM management baked into One UI. It deserves a network that matches that ambition.
All Four UK Networks, One eSIM
Fuse is the only UK eSIM provider that connects you to all four major networks — EE, Three, Vodafone, and O2 — automatically. Your S25 selects whichever network has the strongest signal at your location, in real time. In a busy city centre, that might be EE. In a rural valley, it might be O2 or Three. You never have to think about it.
Compare that with single-network eSIM providers: some popular Samsung eSIM options in the UK run exclusively on one network. Lock yourself to a single network and you're at the mercy of that network's coverage gaps — no matter how good your phone's hardware is. You can see how Fuse stacks up on our coverage page.
No Contracts, Instant Activation
Fuse plans are rolling monthly — cancel any time, no exit fees. Activation is instant via QR code, exactly as you've just done above. There's no waiting for a SIM card in the post, no store visit, no paperwork.
Plans That Suit Every S25 User
Fuse offers three plans, all with no contract:
| Plan | Data | Price | Roaming |
|---|---|---|---|
| Spark | 5GB | £5.99/mo | UK only |
| Pulse | 10GB | £9.99/mo | 130+ countries |
| Surge | 15GB | £14.99/mo | 130+ countries |
Pulse is the most popular choice — 10GB covers most everyday use, and roaming in 130+ countries is included, which is ideal if you travel with your S25. Surge suits heavier data users or frequent travellers who want a larger allowance. Spark is a great value option if you're primarily on Wi-Fi and just need a mobile data safety net.
Not sure which to pick? Start with the 7-day free trial — 500MB included, no charge until day 8, and it converts to your chosen plan when you're ready.
You can compare all plans in detail on the Fuse plans page.
How Fuse's Multi-Network Switching Works
When you activate a Fuse eSIM, your S25 connects to a multi-network profile that carries agreements with all four UK networks. The phone's modem handles network selection automatically, just as it would roaming internationally — except this happens across all four domestic networks. There's nothing to configure and no app to run. For a deeper look at how it works, visit how it works.
Troubleshooting: eSIM Activated but No Signal
If your Fuse eSIM shows as active in SIM Manager but you're not getting a data connection, try these steps:
- Toggle Airplane Mode — swipe down to the quick panel, enable Airplane Mode for 10 seconds, then disable it. This forces the modem to re-register on the network.
- Check mobile data is on — go to Settings > Connections > Mobile networks and confirm mobile data is enabled for the Fuse eSIM.
- Restart the phone — a full restart clears most transient modem issues.
- Check APN settings — Fuse eSIM profiles include APN settings automatically, but if yours looks blank, contact Fuse support via the help centre.
- Confirm your plan is active — log in to your Fuse account to verify your trial or plan is running.
Frequently Asked Questions
Does the Samsung Galaxy S25 support eSIM?
Yes. All UK variants of the Samsung Galaxy S25, S25+, S25 Edge, and S25 Ultra support eSIM. Each model supports one physical nano-SIM and one active eSIM simultaneously, with multiple eSIM profiles stored on the device.
Can I use an eSIM and a physical SIM at the same time on the S25?
Yes — the S25 supports Dual SIM Dual Standby (DSDS). You can have a physical SIM and an eSIM active at the same time, assigning calls, texts, and data to each independently via Settings > Connections > SIM Manager.
Why can't I see the 'Add eSIM' option on my Samsung Galaxy S25?
The most common reason is a carrier-locked handset. If you bought your S25 on a network contract, it may be locked to that carrier. Contact your network to request an unlock. Other causes include outdated software (update via Settings > Software update) or a full eSIM profile store (delete an old profile in SIM Manager to free up a slot).
Do I need to remove my existing SIM to add a Fuse eSIM?
No. The Galaxy S25 supports both simultaneously. You can add the Fuse eSIM without touching your physical SIM card, then choose which SIM handles data, calls, and texts independently.
Does Fuse eSIM work abroad on the Samsung Galaxy S25?
Yes — Fuse's Pulse (10GB, £9.99/mo) and Surge (15GB, £14.99/mo) plans include roaming in 130+ countries at no extra cost. Simply keep your Fuse eSIM set as the mobile data SIM when you travel. The Spark plan (5GB, £5.99/mo) is UK-only. Full details are on the Fuse plans page.
Summary
Setting up an eSIM on the Samsung Galaxy S25 takes under five minutes: open Settings > Connections > SIM Manager > Add eSIM, scan your QR code, set Fuse as your data SIM, and you're connected. If the option isn't showing, check for a carrier lock or a pending software update.
Once you're set up, Fuse gives your S25 access to all four UK networks automatically — so your phone's excellent hardware is always backed by the strongest available signal, wherever you are.
Ready to get started? Try Fuse free for 7 days — no charge until day 8.