# What is an eSIM? A plain guide for travelers > What is an eSIM? A digital SIM built into your phone. Learn how eSIM works, eSIM vs physical SIM, pros and cons, and how to use one when you travel. Source: https://linkpals.store/what-is-esim ยท Updated 2026-11-06 What is an eSIM? It's a SIM card built into your phone as a chip, so you add a mobile plan by scanning a QR code instead of inserting plastic. For travel, that means you can buy local data before you fly, keep your home number on your physical SIM, and connect the moment you land. ## What is an eSIM? Meaning and full form eSIM stands for **embedded SIM**. The full form describes exactly what it is: a small chip soldered onto your phone's board that does the job a removable SIM card used to do. It stores a mobile network profile, proves to that network that your phone is allowed on it, and gives your phone a line for data, calls or texts. The chip itself never changes. What changes is the profile on it. You download a profile from a provider, and your phone treats it like a new SIM. Most phones hold several eSIM profiles at once and let you switch between them in settings. > **Quick answer:** an eSIM is a digital SIM. Nothing to insert, nothing to lose, and you can add a plan from anywhere with an internet connection. ## How does an eSIM work? Once you know what an eSIM is, the setup makes sense: your phone downloads a network profile instead of reading one from a plastic card. Setting up an eSIM takes a few minutes. Here's what happens behind the scenes when you add a plan: 1. **You buy a plan.** The provider creates an eSIM profile for you on a secure server run by the network. 2. **You get a QR code.** The code points your phone to that server and holds a one-time activation key. 3. **Your phone downloads the profile.** You scan the code, the phone checks the key, and the profile installs on the eSIM chip. 4. **The line appears in settings.** You can name it, switch it on or off, and pick it as your mobile data line. 5. **It connects on arrival.** When you land, the line joins a local partner network and data starts working. Because the profile downloads over the internet, you can install it at home on Wi-Fi days before your trip. That's the part travelers like most: no hunting for a SIM kiosk at the airport. ## eSIM vs physical SIM Both connect your phone to a mobile network. The difference is how you get and manage them. | | eSIM | Physical SIM | | --- | --- | --- | | Format | Chip built into the phone | Removable plastic card | | How you get it | Scan a QR code or tap a link | Buy in a store or wait for delivery | | Switching plans | In settings, in seconds | Swap the card with a SIM tool | | Lines on one phone | Several profiles stored, usually two active | One per SIM slot | | Loss or theft | Can't be pulled out of the phone | Can be removed and reused | | Moving to a new phone | Transfer or reinstall the profile | Move the card | Most travelers use both: the physical SIM keeps their home number active, and an eSIM handles local data. Your phone runs them side by side as two lines. ## eSIM benefits for travel - **Connect on arrival.** Install before you fly and land with working maps, rides and messages. - **Keep your number.** Your home SIM stays in the phone for calls, SMS and bank one-time passwords. - **Skip roaming bills.** A prepaid travel eSIM costs a fixed amount, so nothing surprises you on next month's bill. - **No ID or store visit.** With [LinkPaLS](https://linkpals.store/destinations) you buy online and get your QR code by email in minutes. - **One eSIM, several countries.** Regional and global plans keep you online across borders. - **Share your data.** Turn on hotspot for a laptop or a travel partner. ## eSIM disadvantages to know eSIMs are simple, but they're not perfect. Plan around these before you buy: - **Your phone must support eSIM and be carrier-unlocked.** Check yours on our [compatible devices](https://linkpals.store/compatible-devices) page or dial *#06# and look for an EID number. - **Most QR codes install once.** If you delete the eSIM from your phone, you usually can't reinstall it with the same code. - **Travel eSIMs are mostly data-only.** You call and text through apps like WhatsApp or FaceTime; your home SIM still receives regular calls. - **Switching phones takes a step.** You can't just move a card; you transfer or reinstall the profile. ## How to get an eSIM There are two ways to get one. Your home carrier can move your existing number onto an eSIM, which replaces your physical SIM. Or you can add a second eSIM from a travel provider, which sits next to your home SIM and adds local data abroad. Travelers almost always want the second option, because it keeps the home number untouched. 1. **Check your phone** supports eSIM and is unlocked. Dial *#06# and look for an EID. 2. **Pick a plan** for your destination, with the data and days you need. 3. **Pay online.** Your QR code arrives by email. 4. **Scan it on Wi-Fi** in your phone's SIM settings. The new line appears next to your home SIM. ### How much does an eSIM cost? The eSIM itself is free; you pay for the data plan on it. A travel eSIM is usually cheaper than your home carrier's roaming pack, because you're buying local data at local rates instead of roaming on a foreign network. Prices depend on the country, the data amount and the number of days. ## Using an eSIM when you travel A travel eSIM is a prepaid data plan for the country or region you're visiting. You pick the data amount and the number of days, pay once, and install the eSIM before you leave. When you land, you turn the eSIM line on, set it as your mobile data line, and switch on data roaming for that line only. LinkPaLS works this way across [countries, regions and global plans](https://linkpals.store/destinations). Plans are data-only and prepaid. You don't need a passport or ID to buy, and your QR code arrives by email within minutes. For step-by-step setup on iPhone and Android, see [how to activate an eSIM](https://linkpals.store/help). So, what is an eSIM worth to a traveler? Mostly time and peace of mind: no SIM swap at the airport, no lost card, no roaming surprise, and a working phone the moment the plane doors open. ### Is an eSIM safe? Yes. An eSIM profile is encrypted and locked to your phone's chip, and it can't be pulled out and used in another device the way a stolen SIM card can. Network authentication works the same way it does on a physical SIM. ## Frequently asked questions ### What is the difference between a SIM card and an eSIM? A SIM card is a removable piece of plastic. An eSIM is a chip built into your phone that you set up by scanning a QR code. Both connect you to a mobile network. ### Can I still use WhatsApp with an eSIM? Yes. WhatsApp stays linked to your home number, which stays active on your physical SIM. The eSIM just provides the data. ### Does an eSIM use my phone number? A LinkPaLS travel eSIM is data-only, so it doesn't replace your number. Your home SIM keeps your number for calls and SMS. ### Is there a monthly fee for an eSIM? Not with a prepaid travel eSIM. You pay once for a set amount of data and days. There's no contract and no monthly bill. ### How many eSIMs can a phone store? Most phones store five or more eSIM profiles, and run two lines at a time, for example your home SIM plus one eSIM. ### Do eSIMs drain the battery faster? No more than a physical SIM. Running two lines at once uses a little extra power, so switch off the line you're not using. ### Can I put one eSIM on two phones? No. Each eSIM profile installs on one device. Buy a separate eSIM for each phone. ## Related - [eSIM compatible phones](https://linkpals.store/compatible-devices) - [How to activate eSIM](https://linkpals.store/help) - [Browse travel eSIM plans](https://linkpals.store/destinations)