Czy mogę trzymać kilka profili eSIM na jednym telefonie?

Tak. Nowoczesne telefony przechowują wiele profili, ale tylko ograniczona ich liczba może być aktywna naraz (zwykle jedna lub dwie linie łącznie z fizyczną kartą SIM). Na podróż po kilku krajach zainstaluj wszystkie z wyprzedzeniem i przełączaj aktywny profil w trakcie podróży.

Most modern phones can store more than one eSIM profile at the same time, but 'can store' and 'can run active at once' are two completely different things. A phone might hold ten or twenty profiles without any trouble, yet the number of lines that can actually work simultaneously is capped by that device's own hardware and software — not by anything on our side. This is where travellers doing a multi-country trip most often get the wrong idea, and then run into it right at the airport.

This page is written for anyone planning a trip through several countries, anyone keeping an existing number alongside a new eSIM, anyone who has accumulated eSIMs from past trips and is no longer sure whether the phone is full, and anyone who wants to know how to switch between profiles as smoothly as possible. We explain the real mechanism, common situations, and how to prepare ahead of departure.

How many can be stored versus how many can run at once

How many profiles can be stored is a figure set by the manufacturer for that model and software version. Most phones on the market today can hold enough for ordinary use without coming close to full. But how many lines can be 'active at once' is a much smaller figure, and it usually counts the total number of lines the phone supports altogether, including any physical SIM, not eSIM alone. Some phones run one line at a time, others run two together. The exact number differs by brand, model, and the software version in force at that moment, and we cannot give one universal figure, since it is not something we set.

So before planning to juggle several lines, always check this limit on your own device first. The most direct way is to open the cellular menu in settings and see which lines can be switched active together, or open our device checker tool for information gathered on that specific model.

Check your model's limits with our device checker

Multi-country trips: install everything ahead, then switch

The safest approach for a multi-country trip is to install every country's eSIM profile onto the phone in advance, before departure. Installation only saves the profile file onto the device — it does not switch anything on or start any clock immediately, so doing this ahead of time is perfectly safe. On arrival in each country, you go in and switch on only that country's line, then turn off the one you finished with before switching on the next.

1. 1Install every country's profile before departureOpen the cellular menu in settings and add each country's eSIM profile one at a time. This step does not switch anything on immediately, so it can be done days or weeks ahead.
2. 2Label each line so it is easy to tell apartMost phones let you rename each line yourself, such as by country or trip name. Naming them ahead of time cuts the chance of switching on the wrong one at a rushed airport moment.
3. 3On arrival in the first country, switch on only that country's lineGo into the cellular menu and switch on the line for the country you are currently in. Leave the other countries' lines untouched.
4. 4Before moving to the next country, turn off the current line before switching on the new oneIf your phone caps how many lines can be active together, turning off the current one first avoids hitting that active-line limit.
5. 5Confirm data roaming is on for whichever line is currently activeEach line carries its own data roaming switch. Check that the line you just switched on also has this toggled on, not just switched active.

Running your existing number alongside a new eSIM

Many people want to keep their existing number for calls and SMS while using a new eSIM for data. This works on phones that support two active lines at once, but again requires checking that specific device's limit, since some models with both a physical SIM tray and an eSIM chip still only allow one active line at a time. In that case, you would need to choose which line runs when, rather than having both running continuously.

Another point to watch is the 'default line for data' setting in the cellular menu. Even with two lines active, the phone still picks one as the primary data line. Set the wrong one, and your original number's roaming data can end up being used instead of the eSIM you just bought, without you noticing.

Phone is full: how to remove an old profile

If eSIMs accumulated from several past trips fill up the menu or trigger a warning, the way to manage it is to open the cellular menu and remove profiles you have finished using. Removal only deletes the profile file from the device — it does not cancel the original order or retroactively refund anything. If that plan still had leftover data and has since expired, removing the profile does not bring that leftover data back either.

Common mistakes when switching between several profiles

Summary table: common situations and what to do

Before departure: things worth confirming

• Install every country's eSIM profile ahead of the trip
• Rename each line so it is easy to tell apart, such as by country
• Check exactly how many lines your device can run active at once
• Set the default data line to match whichever you intend to use at each stage
• Clear out any expired or finished profiles before adding new ones
• Turn off the previous line's data roaming each time before switching to a new one

Running several profiles on a tablet or secondary device

The same principle applies to a tablet or secondary device that supports eSIM. Some tablets store several profiles and switch between them just as a phone does, but the settings menu can be worded or laid out differently even on a tablet from the same manufacturer as your phone, since some tablet operating systems run their own customised build. If you plan to use the same eSIM alternately between a phone and a tablet, check first whether that profile is tied to a single device or can move between devices, since that condition is set by the network provider behind the plan and is not something we can change on your behalf.

Accessory devices such as a smartwatch with built-in cellular usually work through a 'tethered to your main number' mechanism rather than installing an independent eSIM profile, which is a different mechanism from the travel eSIM this page is about. If you are unsure whether your accessory device supports the kind of eSIM sold here, check that device's own documentation from its manufacturer before ordering, since not every accessory device supports a travel eSIM the same way a phone does.

Effect on battery and network notifications when running several lines

Switching on several lines at once, or leaving data roaming on across more than one line at the same time, can use more power than running a single line, since the phone's modem has to keep searching for and holding signal with more than one network at once. How much this affects battery life differs by model and by that specific battery's condition, so we cannot give a general figure. If you notice the battery draining unusually fast while several lines are active, try turning off data roaming on whichever line is not currently in use.

Some phones show automatic alerts when lines are switched on and off frequently, or when a line has had data roaming on for an unusually long stretch. These alerts come from the phone's own operating system, not from us. If you see a warning you are unsure about, read the fuller detail inside that phone's cellular menu, since how the message is worded depends on that particular brand's operating system.

If you are still unsure how many lines your phone can run at once

This figure depends solely on the model and its software version. We cannot confirm on your behalf how many active lines a given model allows, since it is something the manufacturer sets. The most accurate way is to open the cellular menu on the actual device and try switching on a second line to see whether it is allowed, or use our device checker tool as an initial reference before confirming again on the real device.

If it is still unclear after trying, or you notice odd behaviour such as an active line dropping off when another is switched on, message us on LINE or by email. We can explain how our own plans work, but the cap on simultaneously active lines is a hardware matter that sits outside anything we can adjust.

Talk to us on LINE about running several profiles