Use an O2 eSIM for prepaid mobile data

  • Install an eSIM (digital SIM card)
  • Connect directly to the O2 network
  • Get instant data, with no roaming charges


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How does an O2 eSIM work?

An eSIM is a digital SIM card, and you probably already have an eSIM-compatible device. When you install an eSIM for a country or region, it lets your device connect to local networks in that area, like O2. This means your device will have data without needing Wi-Fi or paying roaming charges.


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Trust the quality of an O2 eSIM connection

O2 is now owned by Telefónica, but for more than 20 years now, the O2 brand has been well known across the United Kingdom and Germany for providing high-quality mobile service.

Here at aloSIM, we’re proud to use the trusted O2 networks for many of our prepaid eSIM data packages, keeping our customers connected in countries like Slovakia, United Kingdom (UK), Czech Republic, and Germany.

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Why should I use an O2 eSIM?

Need data quickly? A prepaid eSIM data package running on the O2 network can provide a steady, reliable internet connection on your phone, tablet, or computer. All with ZERO roaming charges.

You don’t need to be a regular O2 customer to use the O2 network with a prepaid eSIM. Anyone can purchase a data package and connect to O2 when it’s one of our supported networks for a specific country or region.


How do I get an O2 eSIM online?

It’s easy! You can get an O2 eSIM online by shopping for prepaid eSIM data packages, and making sure the data will run over the awesome, high-quality O2 network.

Here at aloSIM, you can browse our travel eSIM packages and select ‘Network’ to see exactly which networks on which this eSIM is allowed to roam.

Often, you’ll see several supported networks available for each eSIM. This is so your phone can automatically connect you to the best possible network in any given location, as sometimes one will be stronger than another.

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Does aloSIM offer prepaid O2 data plans?

Yup! All aloSIM data plans are prepaid, which means you pay for the data you’d like and then it’s yours to use anytime.

We offer prepaid O2 plans for various countries, including like Slovakia, United Kingdom (UK), Czech Republic, and Germany.

Just select a data package, install the provided eSIM, and activate your data package when you’re ready to use it.

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Does O2 support eSIM?

Does O2 have eSIM? Absolutely! Even if you’re not a regular O2 cellular customer, you can travel to a destination where we use the O2 network and install a prepaid o2 eSIM card.

eSIM is an affordable way to have mobile data when you’re on vacation. Instead of attempting a risky SIM card swap or overpaying for carrier data, you can install an O2 eSIM and connect to local networks for a low prepaid rate.


How is aloSIM affiliated with O2?

Here at aloSIM, we choose top-quality networks to power our prepaid eSIM data packages for 170+ countries.

We don’t own O2 and are not directly affiliated with O2, but we do choose to use O2 as a preferred network for many of our prepaid data packages because we know it will provide our customers with a strong connection during their travels.

Questions about aloSIM? Please reach out anytime via live chat or email (


O2 eSIM data starting at $4.50


New to using an O2 eSIM?

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How to use an eSIM for travel

  1. Download the free aloSIM app
  2. Choose your destination (country or region)
  3. Select a prepaid data package
  4. Install the eSIM on your device
  5. Prepare your device for international travel
  6. Activate your data package

How to avoid roaming charges

  1. Turn Data Roaming off for your primary SIM
  2. Tell your device to use your eSIM for all data

You can still call and text on your regular phone number, but your home carrier may charge fees for each call or text while you’re travelling internationally. (MORE INFO)

FAQs about using an O2 eSIM

Check my device

Most newer phones, tablets, and computers are already eSIM-compatible, so use our eSIM device checker to make sure you have a device that can accept an eSIM.

Free Wi-Fi is great when it’s available, safe, and working well, but some destinations make it just about impossible to get a good connection. That’s why it’s nice to have data as a backup to stay connected.

We’re proud to provide aloSIM customers with fast eSIM data connections that allow them to talk, text, surf, and stream comfortably. You’ll likely experience a 4G (sometimes 5G) or LTE equivalent network in most locations, depending on what’s available in the area.

Installation guides

We have detailed eSIM installation instructions for all compatible devices, so whether you’re looking to add eSIM data to an iPhone or iPad, Google Pixel, Samsung Galaxy, or something else, we’ll be able to walk you through the eSIM set-up process easily.

How to avoid roaming charges

It can be confusing to know the best roaming settings for your phone while you travel internationally, so we’ve created an easy walk-through guide to show you exactly how your phone’s roaming settings should look.

Explore the world with aloSIM data



Our eSIM data packages are prepaid, so you always know exactly what you’ll spend on data. No contracts, no surprises, and never any roaming charges.



You’ll have full access to your regular phone number for calling and texting, and you can add data to your device whenever you need it. No in-store visits required!

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Only buy what you need! If you’re not sure how much data you’ll need, start with a 1 GB package. You can always top up your eSIM with more data later.

Go ahead … travel the world, never pay roaming charges

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