Guide
Your first travel eSIM: what to know before you buy and fly
Everything people ask before buying their first travel eSIM: phone compatibility, when the plan starts counting, and how to avoid paying for roaming twice.
Before your first eSIM you need to settle three things: whether your phone works with it, which plan fits your route, and how to set up the lines so data goes through the eSIM rather than your home SIM. The phone needs a built-in eSIM chip and no carrier lock. Your home number stays in the phone as the other line, and the plan starts counting on first connection in the destination country, so you can install the eSIM at home in advance.
Does my phone support eSIM? Check before you pick a plan
eSIM doesn’t work on every smartphone. It takes two things: the device has a built-in eSIM chip, and the phone isn’t locked to a specific carrier. If the second condition isn’t met, another carrier’s profile may not install even though the phone supports the technology itself.
The easiest way to check your model is the Telegram bot @moresim_bot, which has an automatic compatibility check. If you bought the phone secondhand or abroad, also check its regional version. For tricky cases, MoreSim support is available via /support in the bot, a ticket in your account and email.
A minute spent checking before you pay saves a lot more time later. If it turns out your phone doesn’t accept eSIM, sorting that out in the arrivals hall with no data is much harder than at home with a laptop and an unhurried support chat.
One country or several: which eSIM plan do you need?
Pick the plan by your route: a single-country plan for one country, a regional plan for several, as long as its list covers the whole route. MoreSim covers 200+ destinations, and for a trip around Europe there’s the “Europe” regional plan. Besides “Europe”, as of October 2026 the catalog has the “Caribbean Islands” and “Australia & Asia” (Australia and New Zealand only) regional plans, and no worldwide ones. For other routes, install a plan for each country in advance.
| Route | Which plan to look for | What to check on the plan card |
|---|---|---|
| One country | A plan for that country | Validity at least as long as the trip, data to match your usage |
| Several European countries | The “Europe” regional plan | Every country on your route is on the list |
| Two or three countries in another region | A regional plan or one plan per country | Whether a regional plan covers the whole route |
| Layover in a third country | A plan for the layover country or a regional one | Whether the transit country is on the list |
If your trip covers just one country, start with a single-country plan. A regional plan is handy when you’re visiting several: one install instead of many, and no switching lines at the border. Data, validity and prices for each country are on its catalog page and in the bot.
There’s no universal number for how much data you need; usage depends more on your habits than on trip length. Maps, messaging and search use little. Video, video calls and background photo uploads to the cloud use the most: a week of maps, messaging and photos usually fits in 3–5 GB, while daily video multiplies that. A few settings will help you stay within a small plan.
- Turn off automatic photo and video uploads to the cloud over mobile data, and let them wait for Wi-Fi.
- Download offline city maps and playlists at home.
- Block automatic app updates over cellular data.
- Get a plan with a little headroom: if you run out of gigabytes, you can top it up without a new eSIM.
When does my eSIM plan start counting?
A plan’s days start running not when you buy it or install it, but on first connection to a network in your destination. Until then it just waits, so don’t leave the install until the last evening.
That means you can buy and install the eSIM in advance, while you’re at home on stable Wi-Fi. Installing from a QR code takes a few minutes. At the arrival airport, all that’s left is to switch on the line and turn on data roaming for it, with no hunting for a carrier counter and no trying to scan a code off the screen of the same phone.
Count the plan’s days from your arrival, not your purchase date: the validity should be at least as long as the trip itself. If you do run out of gigabytes or days at the end, you can top up in the bot without a new eSIM.
How to avoid paying for roaming twice
The most common first-eSIM mistake: the plan is bought, but the phone keeps pulling data through the home SIM. You end up with a roaming bill while the gigabytes you paid for sit untouched. To avoid that, assign each line its job in advance.
A dual-SIM phone keeps both lines connected but uses mobile data through only one of them. You decide which one in your Cellular or SIM settings. Menu names depend on your phone model and OS version, but the toggles look similar everywhere.
- Select the eSIM line for mobile data and turn on data roaming for it: most travel eSIMs run on the local network as roaming, and without it you won’t get data.
- Turn off mobile data on your home SIM so your data doesn’t go through your home carrier; otherwise the phone may switch to it when the signal is weak.
- Keep the home line itself on if you’re expecting bank texts; that requires roaming to be available with your carrier.
- Incoming calls and texts while roaming are billed by your home carrier, so check its terms before you leave.
MoreSim plans are data-only, with no phone number. You can call over messaging apps where the country doesn’t restrict them, and that data comes out of your eSIM plan. Bank texts and calls to your number arrive on your home SIM as long as its line is on.
How to buy a travel eSIM, and what you get after paying
You can buy an eSIM on the website or in the Telegram bot @moresim_bot. The bot speaks 40 languages, so your travel companions can use it in their own language too. You can pay with Telegram Stars from any country, right in the bot (bank card and SBP payments currently work with cards issued in Russia).
The bot is handy because your QR code, remaining data and top-ups all live in one chat that’s always at hand. The website suits you if you prefer to shop in a browser: it has a personal account, where you can also open a support ticket.
After payment, the QR code and profile arrive in the chat in about 30 seconds. You can then see your remaining data in the bot and in your account on the website. If your gigabytes are running low, there’s no need to buy a new eSIM: tap “Top up data” on the eSIM card in your account or in the bot’s app and pick a plan, and it’s added to the profile you already have installed, if top-ups are available for that plan.
Pre-flight checklist for your first eSIM
Before you fly with your first eSIM, six steps remain: check the phone, choose and pay for a plan, install it at home and set up the lines in advance.
- Check your phone model in the bot and make sure it isn’t locked to a carrier.
- Pick a plan for your route: one country or several.
- Pay the way that suits you: with Telegram Stars from any country, right in the bot, or by card or SBP, which currently work with cards issued in Russia.
- Install the eSIM at home over Wi-Fi before you leave for the airport.
- Turn off mobile data on your home SIM, but keep the line on for bank texts.
- On arrival, switch on the eSIM line and turn on data roaming for it.
FAQ
How do I know if my phone supports eSIM?
A travel eSIM needs two things: your phone has a built-in eSIM chip, and it isn’t locked to a specific carrier. You can check your model in the Telegram bot @moresim_bot, which has an automatic compatibility check. If you bought the phone secondhand or abroad, also check which regional version it is.
What happens to my phone number if I add an eSIM?
You keep your home number: a MoreSim travel eSIM installs as a second line, so you don’t need to take out your physical SIM. On your trip, data goes through the eSIM, and your home line can stay on to receive texts such as bank codes. Incoming calls and texts while roaming are billed by your home carrier, so check its terms before you leave.
When does an eSIM plan start: when I buy it or when I arrive?
A MoreSim plan doesn’t start when you buy it or when you install it, but on first connection to a network in your destination. So you can buy and install the eSIM in advance at home over Wi-Fi without losing any of the days you paid for. Count the plan’s days from your arrival date, not your purchase date.
Can a regional eSIM plan start during a layover?
Yes. If your layover country is covered by the regional plan and your phone connects to a network there, the plan can start counting right there. To prevent that, keep the eSIM line turned off until you land in your final destination.
How do I avoid roaming charges when I have an eSIM?
A dual-SIM phone uses mobile data through only one line, and you have to pick it yourself. In your Cellular or SIM settings, choose the eSIM as the mobile data line and turn on data roaming for it, then turn off mobile data on your home SIM. Otherwise, when the signal is weak, your phone may switch to data on your home SIM and you’ll get a roaming bill.
Where can I buy a travel eSIM and how do I pay?
You can buy a MoreSim eSIM on the website or in the Telegram bot @moresim_bot, and pay with Telegram Stars from any country, right in the bot (bank card and SBP payments currently work with cards issued in Russia). After payment, the QR code and profile arrive in the chat in about 30 seconds. Data, validity, price and the list of countries are shown on the plan card on the website and in the bot.
What if I run out of eSIM data on my trip?
You don’t need to buy a new eSIM: MoreSim plans are topped up in the Telegram bot @moresim_bot. Open the eSIM card in your account or in the bot’s app, tap “Top up data” and pick a plan; it’s added to the profile you already have installed, if top-ups are available for that plan. You can see your remaining data in the bot and in your account on the website.