What is an eSIM?

eSIM stands for embedded SIM card, literally meaning a built-in SIM card. Some devices have an eSIM and still have space for a physical SIM card, allowing you to use two SIMs on one device—one for personal use and one for business, for example.

It’s also possible to link your eSIM to your smartwatch. Doing so makes your smartwatch independent of your smartphone.

How Does a Smartwatch with a SIM Card Work?

You can immediately identify a smartwatch that works with a SIM card by its title. You’ll always see one of the following words or abbreviations:

• LTE
• Cellular
• eSIM
• 4G or 5G

The digital SIM card for your watch functions the same as a digital or physical SIM card for your smartphone. You won’t notice any differences between the two. The eSIM simply enables you to access the internet, make calls, and send SMS on your smartwatch using 4G or 5G.

Unlike dual-SIM setups, your smartwatch uses the same number as your smartphone. In your smartwatch settings, you can pair the digital SIM card with your provider. Most major smartwatch brands, including Apple, Samsung, Garmin, and Huawei, already offer smartwatches that can independently connect to mobile data networks.

Single or Multi SIM Card?

There are two types of SIM cards you can use for your smartwatch: single and multi SIM cards. A single SIM card is a standalone card with its own phone number and subscription for your smartwatch, allowing people to call you directly on your watch. This requires two subscriptions—one for your smartphone and one for your smartwatch.

With a multi SIM card, you use one subscription. You receive calls, messages, and SMS on both devices. Naturally, you can also get these notifications on your smartwatch when your smartphone isn’t nearby.

What Are the Advantages of a Smartwatch with a SIM Card?

Digital SIM cards are a smart solution to replace physical SIM cards. But why would you want to use one? To help you decide, we’ve listed what we consider the key advantages of a digital SIM card.

1. You’re Always Reachable

When you’re exercising, cycling, or taking a walk and prefer not to bring your smartphone or if its battery dies, you can still use your smartwatch with a SIM card.

Get a call during your workout? Answer easily with your smartwatch and hear clearly with your connected earbuds.

Not just calls—messages also come through on your smartwatch. Reply with a quick response, an emoji, or a voice message.

WhatsApp on your smartwatch?

We previously wrote a detailed blog about this.

2. Music Streaming

Smartwatches with a SIM card can stream your favourite music without filling your memory by downloading it first.

3. Multiple Devices on One SIM Card

Since your SIM card is now digital, it’s much easier to pair it with multiple devices. Link your multi-SIM to your smartphone, smartwatch, tablet, or smart home devices.

Note! You need a multi SIM card to do this.

What Are the Disadvantages of a Smartwatch with a SIM Card?

Everything has its pros and cons, and the same applies to a smartwatch with a SIM card. Here are the disadvantages to consider.

1. Less Privacy

With a digital SIM card linked to your smartwatch, your provider can track you constantly. If this makes you uncomfortable, a smartwatch without a SIM card might be a better choice.

2. Security

Since data is stored in the cloud, you’re more vulnerable. This makes it easier for hackers to steal your information.

3. Price

Smartwatches with LTE, Cellular, eSIM, 4G, or 5G in the name are those compatible with a SIM card. However, these smartwatches are often significantly more expensive than standard models.

For example:

• Galaxy Watch 5 Pro 45mm with Bluetooth: £296.00
• Galaxy Watch 5 Pro 45mm with Bluetooth + 4G: £356.00

Conclusion

A smartwatch with a SIM card has one compelling difference compared to one without: the ability to use a mobile data network to access the internet, make calls, send messages, or stream music outside your smartphone’s range.

If you always carry your smartphone and don’t mind, a smartwatch with a SIM card isn’t necessary. But if you find it inconvenient or distracting to always have your phone with you, a smartwatch with a (digital) SIM card is a solution.

Frequently Asked Questions

What’s the difference between an eSIM and a SIM card?

An eSIM functions the same as a SIM card, but it’s built into your device, whereas you insert a physical SIM card into your phone.

Which providers support eSIM in the UK?

EE, O2, Three, and Vodafone.