How many eSIMs are in a S25 Ultra?

The Samsung Galaxy S25 Ultra can store multiple eSIM profiles in its internal memory, but only two lines—whether two eSIMs or one eSIM plus the physical SIM—can be active at the same time. You manage and toggle profiles in Settings under SIM manager, making it simple to switch between personal, work, or travel plans.

How to activate eSIM in S25 Ultra?

Open Settings, tap Connections, then SIM manager, and choose Add eSIM. Scan the QR code provided by your carrier or eSIM provider. The Galaxy S25 Ultra downloads the profile in about 60 seconds. Label the line, set it as your data line if needed, and enable data roaming for travel eSIMs to complete activation.

What is the disadvantage of eSIM?

An eSIM ties your plan to one device, so you cannot pop the SIM into a backup phone as quickly as a physical card. Switching devices requires a new QR code or carrier approval. Some smaller carriers and rural networks do not yet offer eSIM provisioning, limiting your choices. Physical damage to the phone can also complicate number recovery compared to simply moving a SIM card.

Is Samsung S25 Ultra eSIM only?

No. The Samsung Galaxy S25 Ultra includes a physical nano-SIM slot alongside eSIM support. You are free to use a traditional SIM card, an eSIM, or both at once. This hybrid design gives you maximum flexibility, whether you prefer physical SIM cards or want the convenience of instant eSIM activation for travel and secondary lines.

Samsung Galaxy S25 Ultra eSIM — Compatibility & Setup

Does the Samsung Galaxy S25 Ultra support eSIM?

Yes, the Samsung Galaxy S25 Ultra supports eSIM. All regional variants of the Samsung Galaxy S25 Ultra ship with eSIM capability, letting you activate a cellular plan without a physical SIM card.

Samsung Galaxy S25 Ultra eSIM compatibility

The Samsung Galaxy S25 Ultra includes dual-SIM functionality in two configurations. You can run one eSIM alongside the physical nano-SIM slot, or you can activate two eSIMs simultaneously without using the physical tray at all. This flexibility makes the Samsung Galaxy S25 Ultra eSIM setup ideal for travelers, remote workers, or anyone juggling personal and business lines on one device.

Samsung confirms eSIM support across all markets where the Galaxy S25 Ultra is sold, including North America, Europe, Asia-Pacific, and the Middle East. You do not need a specific SKU or carrier-unlocked model; factory-unlocked and carrier-sold units both support eSIM, though your carrier must offer eSIM provisioning.

Dual-SIM options

The device holds one physical nano-SIM and supports multiple eSIM profiles stored in memory. You can keep several eSIM profiles installed and switch between them in Settings, but only two lines—whether eSIM plus physical SIM, or two eSIMs—can be active at once. This design answers the question "Does the Samsung S25 Ultra have dual SIM?" with a clear yes, and gives you the freedom to choose your preferred combination.

How to set up an eSIM on the Samsung Galaxy S25 Ultra

Activating an eSIM on the Samsung Galaxy S25 Ultra takes about 60 seconds once you have your QR code or activation details from your carrier or eSIM provider. Follow these steps to complete your Samsung S25 eSIM activation.

Set up an eSIM in Settings

Open Settings and tap Connections.
Tap SIM manager (or SIM card manager depending on your software version).
Select Add eSIM or Add mobile plan.
Choose Scan QR code. Hold your phone steady over the QR code provided by your carrier or travel eSIM service until the camera recognizes it.
Tap Add to confirm. The Galaxy S25 Ultra will download the eSIM profile and display a confirmation message.
Label your line—for example, "Work," "Travel," or "Home"—so you can identify it easily in Settings and the phone dialer.
Set your preferred line for mobile data, calls, and texts in SIM manager. You can toggle data between lines at any time.

If your provider supplies an activation code (SM-DP+ address and activation code string) instead of a QR code, tap Enter activation code manually in step 4 and paste the details. The rest of the process remains the same.

How to activate eSIM on S25 Ultra with a second profile

To install a second eSIM—useful if you want dual eSIM without the physical SIM—repeat the steps above. The Galaxy S25 Ultra stores multiple eSIM profiles, and you choose which two lines stay active in SIM manager. Switching between stored profiles does not require a new download; simply enable the profile you want and disable another if you already have two active.

Using a travel eSIM on the Samsung Galaxy S25 Ultra

A travel eSIM is the easiest way to get mobile data abroad without paying roaming fees or hunting for a local SIM card shop. You buy a data plan online, receive a QR code by email, and install the eSIM before you board your flight. When you land, the travel eSIM connects to a local network and delivers data at local rates.

Install before you fly

Set up your travel eSIM while you still have Wi-Fi at home or at the airport. Follow the activation steps above to scan the QR code and add the plan as a second line. Leave your home SIM active so you can still receive calls and text messages—including two-factor authentication codes—on your usual number. In SIM manager, set the travel eSIM as your mobile data line and turn on Data roaming for that line only. Your Samsung Galaxy S25 Ultra will route all internet traffic through the travel eSIM and keep voice and SMS on your primary SIM.

You can browse eSIM plans for dozens of countries and regions, compare data allowances, and purchase a plan that fits your trip length. Most travel eSIM providers send the QR code instantly, so last-minute travelers can still get connected.

S25 eSIM or physical SIM for travel?

An eSIM saves you the hassle of removing your home SIM, storing it safely, and swapping cards at every border. You also avoid the risk of losing a tiny plastic card or damaging the SIM tray. Because the Galaxy S25 Ultra supports dual-SIM, you keep both numbers live and simply toggle which line carries data. That flexibility makes eSIM the preferred choice for frequent travelers.

Tips & troubleshooting

Turn on data roaming for the eSIM line

A common stumbling block: you install the travel eSIM but see no data signal. Open Settings → Connections → SIM manager, tap your travel eSIM, and confirm Data roaming is enabled. The Samsung Galaxy S25 Ultra treats every eSIM as a roaming line when you are outside the plan's home region, so roaming must be on. Your primary SIM can keep roaming off to avoid surprise charges.

Keep the home SIM for calls and two-factor authentication

Leave your original SIM active for voice, SMS, and app-based authentication codes. In SIM manager, assign calls and messages to your home line and mobile data to the travel eSIM. This setup ensures you never miss a bank alert or ride-share verification, even when your data flows through a foreign network.

Fix an eSIM that won't activate

If the QR code scan fails or the profile won't download, restart your Samsung Galaxy S25 Ultra and try again with a strong Wi-Fi connection. Make sure the QR code is not expired—most travel eSIM providers issue codes valid for a few months, and some carriers issue one-time codes that expire after the first scan. If the camera struggles to focus, increase screen brightness on the device displaying the QR code or take a clear screenshot and scan from your photo gallery using the Scan image option in the eSIM setup menu. For persistent issues, confirm your device is carrier-unlocked; a SIM lock will block eSIM activation from third-party providers. You can also check another device's eSIM compatibility or reach out for eSIM setup help if you are managing multiple devices.

Transfer eSIM from S25 Ultra to iPhone

You cannot directly transfer an eSIM profile between Android and iOS. Each eSIM is tied to a specific device IMEI. To move your number to an iPhone, contact your carrier or eSIM provider and request a new QR code for the iPhone. Delete the old profile from the Galaxy S25 Ultra once the new device is active, so you do not risk conflicts or billing issues.

Samsung Galaxy S25 Ultra eSIM