Does hotspot and tethering work with an eSIM?

The short answer: yes, an eSIM works as a hotspot just fine. Your phone sees no difference between a physical SIM card and a digital eSIM profile. As soon as the eSIM has a connection, you can share that connection with your laptop, tablet or a second phone.

Yet people sometimes get stuck. Not because the technology fails, but because one setting is wrong, or because their specific plan limits tethering. This article shows you exactly how to switch it on, what to check before you buy, and what to do when the hotspot refuses to work.

What is tethering, really?

Tethering means your phone passes its mobile internet on to other devices. Your phone effectively becomes a small wireless modem. Apple calls this "Personal Hotspot"; on Android it is usually under "Hotspot and tethering".

You can share in three ways:

• Over wifi: other devices connect to your phone's wifi network. The easiest option for several devices at once.
• Over Bluetooth: slower, but gentler on your battery.
• Over a USB cable: the most stable and secure connection, and your phone charges while you use it. Ideal for hooking up a laptop.

For an eSIM this works exactly the same as for a regular SIM. The data source is digital, the hotspot is no different.

Turning on the hotspot on iPhone

1. First make sure your travel eSIM has a connection and is set as the data source. Go to Settings → Cellular and check that the eSIM is selected under "Cellular Data".
2. Go to Settings → Personal Hotspot.
3. Switch on Allow Others to Join.
4. Set a wifi password that is easy to pass on.
5. On your other device, find the wifi network named after your phone and log in.

Got two SIMs in your iPhone? Then double-check that the hotspot uses your travel eSIM and not your regular SIM, otherwise you might accidentally share your expensive home plan.

Turning on the hotspot on Android

The steps differ slightly per brand, but the route is almost always the same.

1. Go to Settings → Network & internet → SIMs and make sure your eSIM is selected for mobile data.
2. Go to Settings → Network & internet → Hotspot & tethering.
3. Choose Wi-Fi hotspot and switch it on.
4. Set a network name and password.
5. Connect your other device to this network.

On Samsung you will find this under Connections → Mobile Hotspot and Tethering. The naming changes, the behaviour does not.

Mind your plan: not every eSIM allows tethering

This is the most important thing to check in advance. The technology in your phone always works, but your provider decides whether tethering is allowed on your specific plan. There are three flavours:

• Tethering fully allowed: you share data until your plan runs out. The most common situation with good travel eSIMs.
• Tethering with a cap: some "unlimited" plans only share a limited amount (a few GB, say) over the hotspot, or throttle the speed after a threshold.
• Tethering blocked: a small number of cheap plans do not allow sharing at all, to ease the load on the network.

Rule of thumb when buying: if it does not explicitly say hotspot is allowed, do not assume it is. With holySim plans you can share your data over a hotspot; to be safe, always check the details of the plan you choose.

Keep an eye on your data usage

A hotspot feels like free internet, but every shared device pulls from the same plan. And a laptop uses far more than a phone.

• Laptops sync in the background: cloud backups, software updates and email keep running even when you are doing nothing.
• Video streaming and video calls are the biggest drains. Lower the quality if you want to be careful.
• Pause automatic updates and cloud sync on the devices you connect.

If you really want control, use "Low Data Mode" for the hotspot network on iPhone, and restrict background data usage on Android.

What about the battery?

A hotspot costs power. With heavy sharing you can lose around 10 to 15 percent of battery per hour, so a full phone gives you roughly half a day of continuous sharing.

Two tips: share over a USB cable instead of wifi when you connect your laptop, because it is gentler on the battery and your phone charges at the same time. And keep a power bank handy for longer sessions.

Hotspot not working? Run through this checklist

In most cases the eSIM itself is not the problem, a setting is. Work through these points in order:

1. Wrong data source. By far the most common cause. Check that your hotspot uses your travel eSIM and not your regular SIM.
2. eSIM has no connection yet. Without active mobile data there is nothing to share. Check that your eSIM has signal and that data roaming is on.
3. Restart your phone. Sounds basic, but it fixes a stuck hotspot surprisingly often.
4. Check that your plan allows tethering. If sharing is blocked or the cap is reached, the hotspot will not work no matter how you set it up.
5. APN setting on Android. On some Android devices the APN type needs to include "dun". Go to your eSIM's APN settings and add dun to the APN type (for example from default,supl to default,supl,dun).
6. Reset network settings. Switching between SIMs a lot can scramble your network settings. A network reset returns them to default (note that you will lose your saved wifi passwords).