Hotspot & Tethering with eSIM: eSIM & Mobile Connectivity Explained
Learn how hotspot and tethering work with an eSIM, how to share your data with a laptop or friends, and what to check on your plan before you travel abroad.
Updated 16 October 2026
In one sentence
Hotspot and tethering mean sharing your phone's eSIM mobile data with another device, such as a laptop or tablet, so that device can get online through your phone.
In detail
Your phone connects to a mobile network using its eSIM, and tethering lets other devices borrow that connection. A hotspot does this wirelessly by turning your phone into a small WiFi network that other devices join with a password. Tethering in the strict sense means sharing over a USB cable or Bluetooth, which can be steadier and uses less battery. Whichever method you pick, everything the other device does comes out of the same data allowance as your phone. Some eSIM plans allow sharing and some restrict it, so it is worth checking the plan details before you buy.
How it works
Your phone receives data from the mobile network through its eSIM and then acts like a tiny router, passing that data on to the devices connected to it. On an iPhone this feature is called Personal Hotspot, and on Android it is usually called Wi-Fi hotspot or Tethering, found in the network settings. The connected device sees an ordinary WiFi network, but all of its traffic travels over your eSIM plan.
Why travellers should care
If you work from a laptop, travel with a partner, or carry a tablet, hotspot sharing can save you from buying a separate plan for every device. It is also a handy backup when hotel WiFi is slow or you need a secure connection for work. Because a laptop can use data much faster than a phone, a shared connection can drain a small data allowance quickly, so pick your plan size with that in mind. Once your eSIM is installed with the one-tap Install on iPhone or Install on Android button, you can switch the hotspot on in your phone settings, as long as your plan allows sharing.
Related terms
- Mobile Hotspot
- WiFi Sharing
- Data Sharing
- Data-Only eSIM
- Data Allowance
Example
Priya, a travel blogger, lands in Lisbon with a laptop and a phone. She installs her travel eSIM with the one-tap install button from her delivery email, then turns on Personal Hotspot in her iPhone settings. Her laptop joins the phone's WiFi network and she edits photos and uploads a post from a cafe. She keeps an eye on her data usage in her phone settings, because the laptop's traffic comes out of the same plan as her phone's.
Key takeaway
A hotspot lets one eSIM serve several devices, but the data is shared, so check that your plan allows tethering and choose an allowance that covers every device you plan to connect.
Frequently asked questions
Can I use a hotspot with an eSIM?
Yes, in most cases. An eSIM is simply how your phone connects to the mobile network, so the hotspot feature works the same way as it does with a physical SIM. The one catch is that some plans limit or block tethering, so check your plan details before you buy.
How do I turn on a hotspot on my iPhone or Android phone?
On an iPhone, open Settings and choose Personal Hotspot, then switch on Allow Others to Join. On Android, open Settings, go to Network and Internet, then Hotspot and Tethering, and turn on Wi-Fi hotspot. Menu names vary a little between phone brands, so search for 'hotspot' in your settings if you cannot find it.
Does using a hotspot use more data?
The hotspot itself does not add much, but the devices you connect often do. Laptops tend to run automatic updates, cloud backups and video calls that can use far more data than a phone. Pause large updates and backups while tethered, and watch your usage in your phone settings.
Is tethering better than a WiFi hotspot?
It depends on what you need. Tethering over a USB cable is usually steadier and keeps your phone charging, while a WiFi hotspot is more convenient and can connect several devices at once. For a single laptop and a long work session, a cable is often the better choice.
Why is my hotspot not working while I am abroad?
First check that your eSIM plan allows tethering and that mobile data is switched on for the eSIM line. Then make sure data roaming is enabled for that eSIM, restart the hotspot, and try rejoining from the other device. If it still fails, restarting your phone often clears it.
Where you'll use this
More esim glossary
Sources
- Apple Support — Set up Personal Hotspot on your iPhone or iPad
- Google Android Help — Share your phone's mobile data connection with other devices
- GSMA — Remote SIM Provisioning for consumer devices and eSIM overview