What is a hotspot?
A hotspot is a feature on your phone, laptop, or a dedicated device that turns a mobile data connection into its own Wi-Fi network, so other devices —another phone, a laptop, a tablet— can connect to the internet through it. No cables or router needed: just mobile data and a password.
In practice, when you turn on your phone's hotspot, that phone stops being just a phone and starts acting like a small portable router. Anyone with the password can join that network and browse, reply to emails, or use map apps using that phone's data, not their own.
It's useful, for example, when you're working from a café and prefer not to use the public Wi-Fi, or when you're traveling in a group and only one person has an active data plan: instead of everyone buying a separate plan, one person shares their connection with the others through the hotspot.
How does a hotspot work for sharing internet?
The process has three steps, even though on the phone it feels like one. First, the phone connects to the internet through your carrier's network (4G or 5G), just like when you browse normally. Second, the operating system takes that connection and creates a local Wi-Fi network with its own name (SSID) and password. Third, any device that joins that Wi-Fi network gets online by "borrowing" the phone's data connection, as if the phone were the modem.
On Android, this feature is usually called "Wi-Fi zone" or "Portable hotspot"; on iPhone it's called "Share internet" or "Personal Wi-Fi network". Both do the same thing, though there's also a version via USB cable or Bluetooth, known as tethering, which shares data without creating a visible Wi-Fi network.
The difference between "having data" and "having a hotspot" is simple: the data is yours; the hotspot is what lets you lend it, for a while, to another device.
How to turn on the hotspot on your phone
The steps vary a bit depending on the operating system and version, but the logic is the same on all recent models: go to connection settings, turn on the hotspot, and set a password. The table below summarizes the most common path on iPhone and Android.
| Step | iPhone (iOS) | Android |
|---|---|---|
| 1 | Settings → Cellular | Settings → Connections (or Network) |
| 2 | Go to "Personal Hotspot" | Go to "Wi-Fi hotspot and tethering" or "Portable hotspot" |
| 3 | Turn on the switch and set the Wi-Fi password | Turn on "Mobile hotspot" and set the name and password |
| 4 | Look for the iPhone's name from the other device | Look for the network name from the other device |
| 5 | Enter the password shown on screen | Enter the password set in step 3 |
One detail almost nobody checks: on most Android phones, inside the hotspot settings there's an option to choose the frequency band, 2.4 GHz or 5 GHz. In a building with lots of nearby networks —a hotel, an apartment building in a big city— the 2.4 GHz band is usually crowded by dozens of nearby routers, while the 5 GHz band is barely used by anyone yet; switching it right there can make a noticeable difference in connection stability without changing anything else.
Personal Hotspot vs. Public Wi-Fi
Your phone's hotspot and the public Wi-Fi at an airport, café, or bus station solve the same problem — getting you online — but with a key difference: who controls the network. When you use your hotspot, your phone creates the network and only people you authorize with the password can join. When you use public Wi-Fi, a stranger manages the network, and anyone else connected to that same network shares, to some degree, the same environment.
That doesn't mean all public Wi-Fi is unsafe, but it does explain why many travel guides recommend avoiding banking or entering sensitive passwords on open, password-free networks. A personal hotspot, on the other hand, is encrypted with the password you set, which reduces that particular risk. The trade-off is data usage: public Wi-Fi doesn't eat your data plan; your own hotspot does.
What Does "Hotspot" Mean?
"Hotspot" is an English term used as-is in many languages, though it has a translation: the closest equivalent is "access point" or, in some contexts, "coverage zone" or "Wi-Fi zone." Literally, "hot spot" means a place where activity is concentrated; applied to networks, the "hot spot" is where the available internet signal is concentrated.
The term first became popular for naming public Wi-Fi access points in cafés, airports, and hotels, before phones could create their own. With the arrival of 3G and 4G mobile data, "hotspot" also came to mean the feature that turns your phone into that portable access point — which is the most common meaning today.
Hotspot with Your Data Plan vs. Travel eSIM: Which Is Better?
When you travel abroad, your phone's hotspot still works the same way, but the data it shares depends on your home plan. If that plan doesn't include international roaming, turning on the hotspot overseas can rack up charges for data used outside your country, billed by your regular carrier. A data eSIM for your destination avoids that problem: you install a local or regional profile on your phone, activate data there, and from that same line you can still use the hotspot to share the connection with the rest of the group.
| Aspect | Hotspot with Your Home Plan | Hotspot with a Data eSIM for Your Destination |
|---|---|---|
| Cost abroad | Depends on whether your plan includes roaming; if not, it can be expensive | You pay for a defined local or regional data plan before you travel |
| Phone number | Your number stays the same, useful for calls and SMS | The eSIM is usually data-only; your main line stays active for calls |
| Setup | No setup needed, it's already on your phone | Installed via QR code before or upon arrival |
| Sharing with the group | Yes, via hotspot, but using one person's data and cost | Yes, via hotspot, with a plan designed for that specific trip |
If your home data plan doesn't cover your destination well, it's worth comparing the cost of roaming against a data eSIM for that country, especially on multi-day trips where the hotspot is used daily for work or browsing. If you've never installed one, this guide explains what an eSIM is and how it differs from a physical SIM.
How Many Devices to Connect and How Long the Battery Lasts
Most current phones let you connect several devices to the same hotspot at once, though the exact limit depends on the model and operating system. In practice, the more devices that connect and actively use data — especially video or real-time navigation maps — the faster the hotspot phone's battery drains, because it's doing two jobs: keeping the data connection active and constantly transmitting the Wi-Fi signal.
| Activity | Approximate data usage |
|---|---|
| Messaging and email (text) | Low, a few MB per hour |
| Maps with real-time navigation | Moderate, tens of MB per hour |
| Video call | High, hundreds of MB per hour |
| Video streaming | High to very high, depends on the selected quality |
For long trips where the hotspot is used for several hours straight, it helps to keep the phone plugged into a portable charger or power outlet while it's sharing the signal, and lower the video quality in streaming apps if the goal is to make the connection last for the whole group, not just one person.
Common problems when using a hotspot abroad
The most frequent issue isn't technical, it's about your plan: some carriers block or limit hotspot use outside your home country, even if the rest of your data works normally. Another typical problem is weak signal in rural or mountain areas, where the local carrier at your destination has less coverage than in the cities. It also happens that when you activate a hotspot with roaming data, the consumption adds up differently than it does at home, and it's easy to lose track of how much of your plan is left.
Many of these issues happen with any travel connectivity provider, not just traditional carriers; this guide on common eSIM problems explains the most frequent causes and how to diagnose them before assuming your phone is failing.
Real example: a road trip with a single hotspot
Imagine a five-day road trip along the coast, with three people in the car: the driver, the passenger checking the map, and someone in the back replying to work messages. Instead of each person buying a separate data plan for the destination, one person just installs a data eSIM for that country on their phone, turns on the hotspot, and shares the network with the other two phones for the whole trip.
The passenger uses that network for real-time navigation, the person in the back uses it for email and messaging, and the driver keeps their phone connected only when needed at stops. At the end of the trip, data usage is concentrated on a single line with a plan designed for that destination, instead of three separate roaming plans accidentally activated on day one.
Before a trip like this, it's worth checking that the phone acting as the hotspot is eSIM compatible; the list isn't the same across all brands or all countries where the same model is sold, so it's worth checking which phones are eSIM compatible before you leave, and following the steps for how to install an eSIM a few days in advance, not the night before your flight.
Frequently asked questions
Does the hotspot drain more battery than normal phone use?
Yes, because the phone keeps the data connection active while also transmitting a constant Wi-Fi signal for other devices. The longer the hotspot is on and the more devices use it, the faster the battery drains.
Can I use the hotspot with a travel eSIM?
Yes. An eSIM works like any other data line inside your phone: once installed and with active data, you can turn on the hotspot from that same phone and share the connection with other devices, just as you would with a physical SIM.
How many devices can I connect to the same hotspot?
It depends on the phone model and operating system, but most allow several simultaneous connections. The more devices connected and the more data they use at once, the slower the connection becomes for everyone.
Does the hotspot work without an internet connection?
No. The hotspot doesn't generate internet by itself; it only redistributes the data connection your phone already has. If your phone has no mobile data or signal, the hotspot has nothing to share.
Is it safe to use someone else's hotspot at an airport or café?
It's more controlled than an open public Wi-Fi because it usually requires a password that only the person who created it knows, but it's still best to avoid entering banking information on networks you don't manage directly.
Why doesn't my hotspot show up in another device's Wi-Fi list?
The most common causes are that the hotspot is still turned off, the other device has Wi-Fi disabled, or the chosen frequency band (5 GHz) isn't compatible with the device trying to connect, in which case you should switch it to 2.4 GHz.
Does the hotspot use the same data as using the internet directly on the phone?
Yes, the data consumed through the hotspot comes from the same plan on the phone that's sharing it. There's no separate data pool just for the hotspot, unless your carrier applies a specific restriction on that feature.
Can I turn on the hotspot while on international roaming?
Generally yes, but the usage adds to your roaming, which in many plans is more expensive or limited than using data in your home country. Before sharing a hotspot for an entire trip, it's worth checking whether a local or regional data line for that destination makes more sense.
Conclusion
The hotspot is, at its core, a simple tool: it takes the data you already have and lends it to other devices for a while. The point where it's worth thinking a bit more is about what data you're lending when you travel, because that's where it can get expensive without you noticing, especially if your home plan doesn't cover your destination well.
That's what travel data eSIMs are for: you install them before you leave or when you arrive, with more than 200 destinations available, activation in about 1 minute, and up to 180 days to activate them from the moment of purchase, so you don't have to install them on the day of your flight. If anything isn't clear during installation or your trip, support is available 24/7 in all languages by email and WhatsApp, not just during office hours.
If your next trip involves sharing a connection between several people or devices, it's worth checking out the collection of international eSIMs by destination and putting together your data plan before you leave, instead of improvising with roaming on day one. For anyone who wants to understand the whole process from start to finish, from choosing a destination to installing and activating the eSIM, the ultimate eSIM travel guide covers each step in more detail.
