When you travel abroad with family or a group of friends, sorting out connectivity is one of those things people second-guess before departure: "Do we need one for everyone?" or "Can we all just share a single line?" Here's the short answer: if everyone stays together the whole time, sharing one person's line (tethering) is often enough, while if people are likely to split up, one eSIM per person gives more peace of mind. Tethering is a handy way to keep costs down, but whether it's allowed and under what conditions varies by plan, and sharing among several people uses up data faster. This guide breaks down how to choose based on group size, trip length, and how you'll move around, plus rough data estimates — written to be easy to follow even if it's your first time. One note: like many eSIMs, Bloomy plans are data-only by design (as of June 2026), meaning no phone number, SMS, or voice calls. If you need a phone number or text messaging, it's worth lining up a separate option as well.
The bottom line: it's about how much you stay together, not how many you are
When choosing connectivity for a family or group trip, it's tempting to think purely in numbers — "there are four of us, so we need four eSIMs." But what really drives the decision is your movement pattern. If you're always in the same room, the same car, or on the same tour, one shared line is often plenty. But if there's any chance of splitting up — free time, separate shopping trips, taking the kids a different way — anyone out of range of the shared line loses their connection during that time. So the first, waste-free step is simply to talk it over as a group: will anyone be off on their own?
Three ways to cover a group's connectivity abroad
Broadly speaking, there are three ways to set up connectivity for a group abroad.
- One eSIM per person: everyone installs an eSIM on their own phone, so each person is connected independently.
- One shared line (tethering): one person uses an eSIM and shares that connection with the others over Wi-Fi.
- Rental Wi-Fi router: everyone shares a single portable router, which means carrying an extra device around.
This guide focuses on the two eSIM approaches — one per person vs. one shared line — since they strike a good balance of convenience and flexibility. If you'd like a broader look at how the different connectivity options compare, take a look at our eSIM guide articles as well.
One eSIM per person: the pros and cons
With this approach, each person installs an eSIM on their own phone. It takes a bit more effort and costs a little more, but the standout benefit is flexibility.
Pros
- Everyone can go their own way: if the kids and parents split up, each person still has maps, messaging, and search at hand.
- No battery worries: you don't have to fret about the host phone's battery draining quickly from tethering.
- Data can be tailored per person: heavier users get more, lighter users get less — easy to match each person's needs.
- One person's trouble doesn't stop everyone: if one phone acts up, it's unlikely to affect anyone else's connection.
Cons
- It costs more, since you're buying one per person.
- You'll need to check that every device supports eSIM and set each one up. Checking ahead on our eSIM-compatible devices page helps avoid surprises.
- You'll have an install step for each person's device before you leave.
For young children, or family members who aren't comfortable with settings, having a parent set up all the devices before departure cuts down on hiccups. You can walk through the steps in our eSIM setup guide. Kids' devices in particular can trip people up on text entry or scanning the QR code, so it's a good idea for a parent to sit alongside and go through the screen together.
One shared line (tethering): the pros and things to watch
Here, one person uses an eSIM and shares that connection with the rest of the family over Wi-Fi tethering. It's easier on the budget, but there are a few things we want to be upfront about.
Pros
- You only need one eSIM, which keeps costs down.
- Only one device needs setting up, so preparation is simpler.
- Even if some family members aren't confident with tech, only one person needs to get connected.
Things to watch (the honest part)
- Whether tethering is allowed depends on the plan. Some plans, including certain high-volume ones, may attach conditions to tethering. Before you buy, check the latest plan details to confirm tethering is supported.
- Data gets used up faster. When several people are streaming video or scrolling social media, all of it draws from the single line, so data drops quicker.
- You lose the connection if you move away from the host. You're limited to wherever the Wi-Fi signal reaches — roughly the same room or a few meters.
- The host phone's battery drains faster, so a power bank is a smart thing to have along.
In short, tethering suits groups that stay together the whole time. If you plan to sightsee separately, factor in that anyone away from the host will be offline during those hours. For example, with a "split up during the day, regroup at night" plan, a realistic combination is to give just the people going off on their own a personal eSIM, while the rest share one line.
Which should you choose? A guide by movement pattern
If you're undecided, use the table below as a rough guide.
| Situation | Better fit | Why |
|---|---|---|
| Always together (family trips, tour-based travel) | One shared line (tethering) | If you're always nearby, sharing is plenty and keeps costs down |
| People split up (free time, shopping, taking the kids a different route) | One eSIM per person | Even when apart, everyone keeps maps and messaging |
| Large group | One per person, or add a router | Funneling everything through one line strains data and battery |
| Very uneven usage (heavy users vs. barely-users) | One per person (data tailored individually) | Each person picks the right amount, with little waste |
| A mix — separate by day, together at night | One per person for some, shared for the rest | Giving only those who split off their own line balances cost and peace of mind |
It's typical on a family trip for needs to vary by person — "the kids just need enough to stay in touch, the parents need more for maps and social media." If you'd like to fine-tune data per person, you can pick a plan that fits each one from our eSIM comparison page, searchable by country, data amount, and number of days.
Rough data estimates by group size and trip length
How much data you need depends on how you use it and how many of you there are. These are only ballpark figures (based on typical usage as of June 2026), but they're a useful starting point.
| Usage per person (per day) | Main activities | Rough daily data |
|---|---|---|
| Light | Mostly maps, search, and messaging | About 0.3–0.5 GB |
| Standard | Social media, sharing photos, occasional video | About 0.7–1.5 GB |
| Heavy | Lots of video streaming and video calls | About 2 GB or more |
When sharing via tethering, think of it as "number of people × per-person estimate" all coming out of one line. For example, a family of three with standard usage sharing one line might plan for around 2–4 GB per day. Multiply that by the number of travel days and you'll get a rough sense of how much you'll need for the whole trip. Families or groups that use a lot — especially heavy video and video calls — might also consider an unlimited plan, where you don't have to keep an eye on your data allowance. That said, even unlimited plans may come with a fair-use policy, reduced speeds after a certain amount of use, or conditions on tethering, so check the current terms before you buy. The figures here are only estimates — actual usage varies with the apps you use and your video quality settings. When in doubt, choosing a little extra helps ease the worry of running short while you're away.
From purchase to arrival (preparing for the whole family at once)
Here's the basic flow for getting everyone set up smoothly.
- Check the devices: confirm that everyone's phone supports eSIM and is carrier-unlocked.
- Choose a plan: decide on data based on your destination, trip length, group size, and usage. One eSIM each if going per person, or a single larger plan if sharing.
- Install before you leave: while you're on home Wi-Fi, it's reassuring to load each person's eSIM onto their device ahead of time.
- Activate at your destination: typically you turn the line on after you arrive (activation timing varies by plan, so follow the instructions provided).
When setting up several devices at once, jot down "whose device and which plan" for each one so you don't mix up QR codes or profiles. Trying to set everything up at the airport on departure day can be tricky amid crowded Wi-Fi and the rush, so it's best to finish at home the day before if you can.
What to do if you can't connect or share
If you run into trouble abroad, don't panic — work through these checks in order.
- Can't share: check that "Personal Hotspot / Tethering" is turned on on the host's device, and double-check the plan supports tethering.
- Can't connect: toggle airplane mode on and off, check the data roaming setting and the APN. A restart can also help.
- Only some people can't connect: confirm that device supports eSIM and that the correct line is selected.
- Slow speeds: speeds can vary with many people using it at once, or with local network congestion and your area. Trying again a bit later or in a different spot is one option.
You'll find detailed steps in our connection troubleshooting guide and FAQ. Tasks that require a phone number or SMS verification (such as confirming local bookings or identity checks) sometimes can't be completed with a data-only eSIM alone, so anyone who needs that should prepare a separate option too. App-based calls — through WhatsApp or similar apps — can generally be used wherever you have a working data connection.
How to search on Bloomy
On Bloomy, you can search for plans by destination, data amount, and number of days. It's easiest to decide first — one eSIM per person if your family splits up a lot, or a single larger plan to share if you're always together — and then choose. If you're unsure about data, leaning a little higher (using the estimates above) helps ease the worry of running short while you're away. The plans, prices, and supported countries actually available may differ by country or region and can change, so please check the latest details on the comparison page before you buy. After purchase, you can review your eSIM from My Account, and for any questions you can reach us via Contact. Note that connection quality varies with the local network, your device, and your area.
You'll find more articles on the same theme in our articles by use case. If you'd like to learn more about choosing an unlimited plan, take a look at our unlimited eSIM articles as well.
