Device compatibility

Does the Galaxy S25 Ultra support eSIM?

The Galaxy S25 Ultra is what decides whether a travel eSIM installs, not the Samsung name on the box. Storage, radio and market variant all change from one model to the next, so every figure below was checked on this model.

Yes. The Galaxy S25 Ultra stores up to 5 eSIM profiles and can keep 2 active at the same time. Installing a travel eSIM takes about 40 seconds and does not touch your normal SIM.

Profiles stored

Active at the same time

2025

Released

Seconds to install, median

What the Galaxy S25 Ultra does with a travel eSIM

The Galaxy S25 Ultra is a phone, so the travel profile is a data line and your existing line stays the voice line. Calls and texts to your usual number keep arriving while Orbislo carries the browsing.

Installing writes the profile. Nothing is spent until it attaches to a network at the destination, so an install three weeks early costs exactly the same as one at the gate. Do it at home, on wifi, while you still have a connection to fix anything.

Storage and active lines

The Galaxy S25 Ultra holds 5 profiles, which is at the low end of everything we have checked. Delete the dead profiles from old trips before you install, or the sheet will simply refuse.

Active is how many lines run at the same time, and on the Galaxy S25 Ultra that is 2. Storage is how many profiles sit on the device waiting, and that is the number that runs out without warning.

Each destination's line installs in one tap from the Orbislo app, and while it is valid every refill lands on that same line. Most of Europe runs on a single line, so a trip through several neighbouring countries takes one slot rather than one per country.

Home line: calls and texts, so bank codes still arrive on your usual number.
Orbislo line: mobile data, with roaming switched on.
Automatic data switching: off, or the phone borrows the expensive line in a tunnel.

5G on the Galaxy S25 Ultra, and where it will not appear

The Galaxy S25 Ultra has a 5G radio and the travel profile uses it. Where a partner network runs 5G, you get 5G, on the same profile and at no extra cost.

88 of our 197 destinations are 4G only on the networks we buy from. On those the icon reads LTE whatever the handset can do, and no setting changes it.

Speed belongs to the network rather than to the profile.

What goes wrong on the Galaxy S25 Ultra, and the fix

Data roaming has to be switched on for this line. Your profile is issued outside the country you are standing in, so the device treats every attachment as roaming. Leave it off and the Galaxy S25 Ultra finds a network and then refuses to use it.

If the profile will not download at all, the order refunds automatically inside 60 seconds, with no ticket. Install again from the same order, because the profile is reissued to your account rather than lost.

On this device the sequence is Settings, Network and internet, SIMs, the Orbislo line, Roaming on. Then set Orbislo as the SIM for mobile data and turn off automatic data switching.

No service on the Orbislo line: roaming is off on that line.
Connected but nothing loads: mobile data still points at the home line.
Works, then stops after an hour: automatic data switching moved you back.
Still searching: airplane mode on for 20 seconds, off, then restart.

Your SIM tray, and tethering

Your physical SIM stays exactly where it is. Adding an eSIM does not touch the tray, does not wipe the card and does not need it taken out. Remove it and you lose your own number, which is the opposite of the point.

Tethering is included on every Orbislo plan at no extra charge. The Galaxy S25 Ultra can share the travel data with a laptop, a tablet or a watch, and nothing behind the hotspot needs a profile of its own.

What an Orbislo plan does once it is installed

Data never expires. A gigabyte you do not use in Lisbon is still there in Bangkok next year, metered plans have no throttle, and every customer gets 100 MB of free rescue data once a month on the line in use when the balance runs out. Unlimited runs full speed to 2 GB a day and then 1 Mbps.

One balance pays in all 197 destinations, and most of Europe runs on a single line, so a rail trip through three neighbouring countries is one install and one balance rather than three of each. Refills arrive on the line you already have, with no new plan or expiry date. Where a destination has more than one partner network, the line can move between them without you touching a setting.

How to install a travel eSIM on the Galaxy S25 Ultra

Open the Orbislo app and tap Install
Confirm the eSIM download prompt
Settings, Network and internet, SIMs, select Orbislo
Turn on Roaming and set Orbislo as the SIM for mobile data

Data roaming sounds like it will cost you money. On the Orbislo line it cannot, because it is how that line reaches partner networks abroad and there is no charge beyond the data you already bought.

The Galaxy S25 Ultra at a glance

Specification	Galaxy S25 Ultra
Takes an eSIM	Yes
Profiles stored	5
Active at the same time	2
5G on partner networks	Yes, where the network runs it
Physical SIM tray	Yes, and it keeps working
Voice on the travel line	Data only
Tethering	Included, no extra charge

Stored is how many profiles the device keeps. Active is how many run at the same time. Checked on this model rather than assumed from the brand.

Galaxy S25 Ultra eSIM questions

Does the Galaxy S25 Ultra support eSIM?

Yes. It stores 5 profiles and runs 2 at the same time. Installing an Orbislo profile takes about 40 seconds and does not touch the SIM you already have.

How many eSIMs can the Galaxy S25 Ultra hold?

5 stored, 2 active at once. Storage is the number that runs out, because a provider that issues a new profile for every trip fills it in a few holidays.

Will I lose my own number?

No. Keep the home line as the voice line and point mobile data at Orbislo. Calls and texts keep arriving on your usual number, as long as your home carrier delivers them abroad.

Do I have to turn roaming on?

Yes, on the Orbislo line only, and it cannot cost you anything. The profile is issued outside the country you are in, so every attachment counts as roaming.

Can I install before I fly?

Yes, and you should. The plan starts counting when the profile first attaches to a network abroad, so an install three weeks early costs the same as one at the gate.

Does tethering work on the Galaxy S25 Ultra?

Yes, on every plan and at no extra charge. Share the travel data from the hotspot with a laptop, a tablet or a watch. Nothing behind it needs a profile of its own.

Pick the destination, then install its line in one tap

Take the metered wallet for maps and messaging, because the balance never expires. Take unlimited if you tether a laptop or stream, and read the 2 GB a day figure before you do.

Get an eSIM for your trip Full install guide See pricing Check coverage

The Galaxy S25 Ultra by market

United Kingdom and Europe: Samsung UK lists the Galaxy S25 Ultra with a nano-SIM tray and an embedded SIM, and three ways to combine them: two nano-SIM cards, one nano-SIM plus one eSIM, or two eSIMs. A travel eSIM can therefore sit next to either a home SIM card or a home eSIM.
United Arab Emirates and the Gulf: The Galaxy S25 Ultra sold by Samsung Gulf accepts two nano-SIMs, a nano-SIM with an eSIM, or Dual eSIM, and its 5G list includes band n71 (600 MHz) as well as n28, n77 and n78. Travellers from the Gulf can load a travel eSIM without giving up their home line.
Hong Kong: Samsung Hong Kong sells the Galaxy S25 Ultra with two nano-SIM slots and lists no embedded SIM. A travel eSIM cannot be installed on this version, so an owner of a Hong Kong S25 Ultra needs a physical SIM card when abroad.
United States (SM-S938U, SM-S938U1): The United States Galaxy S25 Ultra, sold as SM-S938U and SM-S938U1, has a single nano-SIM slot plus support for two eSIMs, with up to two lines in use at once. It is also the version that adds mmWave 5G.
Other markets (SM-S938B, SM-S938B/DS, SM-S938W, SM-S938N, SM-S9380, SM-S938E, SM-S938E/DS): Samsung also sells the Galaxy S25 Ultra under the model codes SM-S938B, SM-S938B/DS, SM-S938W, SM-S938N, SM-S9380, SM-S938E and SM-S938E/DS. The version sold in China takes two nano-SIMs and has no eSIM.

Networks on the Galaxy S25 Ultra

On the European Galaxy S25 Ultra, 5G covers bands n1, n3, n7, n8, n20, n28, n38, n40, n41, n77 and n78, plus n75 as a supplementary downlink band. Its LTE list includes bands 1, 3, 7, 8, 20, 28 and 32, with no mmWave 5G listed.
The Canadian Galaxy S25 Ultra lists a much shorter 5G range: n2, n5, n25, n66 and n71, plus n38, n41, n77 and n78. It omits 5G bands n1, n3, n7, n8, n20 and n28, so abroad it may fall back to LTE where local 5G runs on those bands.
The Canadian Galaxy S25 Ultra does carry LTE bands 29, 30 and 71 for North American networks, while leaving out LTE bands 17, 26, 28 and 32. A travel plan that relies on band 28 for 4G will not reach this version on that band.
The Hong Kong Galaxy S25 Ultra lists 5G band n79 and LTE band 34 alongside n28, n77 and n78 on sub-6 GHz 5G, but no n26. It has no mmWave, and with no embedded SIM it cannot take a travel eSIM.
Only the United States Galaxy S25 Ultra adds mmWave 5G on bands n257, n258, n260 and n261. Its sub-6 GHz 5G list is shorter than the international model's, with bands such as n1, n2, n5, n7, n25, n28, n41, n66, n71, n77 and n78.
Samsung notes that using a nano-SIM and an eSIM at the same time on a Galaxy phone can reduce data speeds in certain areas, and lists the Galaxy S25 series among the models with dual SIM and eSIM support.
For KDDI customers in Japan, Samsung has provided satellite text and data and earthquake and tsunami warnings since 2025 on Galaxy S22 and later flagships, which includes the Galaxy S25 Ultra. This is a KDDI service, not a feature of a travel eSIM.

Worth knowing about the Galaxy S25 Ultra

Samsung promises the Galaxy S25 Ultra seven generations of Android upgrades and seven years of security updates, counted from its global launch date. The phone launched on Android 15 with One UI 7.
Samsung's own specification page gives a security update period for the Galaxy S25 Ultra valid until 31 January 2032, so an S25 Ultra bought now stays patched for years of future trips.
The Galaxy S25 Ultra is on Samsung's list of devices that receive monthly security updates, which bundle Google's Android patches with fixes for Samsung-specific issues. Some carriers only deliver these quarterly.
To add a travel eSIM to a Galaxy S25 Ultra, open Settings, then Connections, then SIM manager, then Add eSIM, and choose Scan QR code. Providers that do not use a QR code supply an activation code to type in on the same screen.
eSIM Instant Transfer moves a number from an older Galaxy or Android phone onto a Galaxy S25 Ultra without calling the carrier, but the new phone must be unlocked. A number can also be moved across from an iPhone where the carrier supports it.
A physical SIM already in a Galaxy S25 Ultra can be turned into an eSIM in SIM manager by selecting the card and tapping Convert to eSIM, where the carrier supports it. Samsung warns that eSIM may not be supported depending on the phone's country of origin.
If a Galaxy S25 Ultra came from a carrier, it may need to be SIM unlocked before it accepts another provider's plan. Samsung directs owners to the original carrier for its unlocking policy and any unlock code.

What the Galaxy S25 Ultra holds

eSIM profiles it can store: 5
Active at the same time: 2
Released: 2025
Form factor: Phone
Network generation: 5G capable where the network carries it
Physical SIM tray: Has a tray as well as eSIM

How the Galaxy S25 Ultra compares with other Samsung models

Galaxy S25 Plus: Galaxy S25 Plus, 2025, stores 5, 2 active
Galaxy S25: Galaxy S25, 2025, stores 5, 2 active
Galaxy S24 Ultra: Galaxy S24 Ultra, 2024, stores 5, 2 active