Stay connected in Europe without expensive roaming charges. Here's why I use an eSIM and how to set one up before you travel.

In 2025, fraudsters ordered four O2 Sims in my name and ran up a huge bill. Now it is happening again - even though I'm not with O2 any more.

Before you fly this summer, sort five things: pick how you will get data abroad (a travel eSIM is usually cheapest and most predictable), install and set up that eSIM while still on home Wi-Fi, turn ...

Adam covers home improvements and mobile networks, splitting his time investigating topics from bathrooms to phone contracts. He was shortlisted at the BSME Talent Awards 2024. A Sim is an essential ...

Our in-house expert researchers and journalists conduct independent, unbiased testing of eSIM services, assessing their real-life effectiveness and usability. By staying current with industry ...

Our in-house expert researchers and journalists conduct independent, unbiased testing of eSIM services, assessing their real-life effectiveness and usability. By staying current with industry ...

Today:Early fog in the far southwest clears quickly. Most areas stay dry with sunshine and variable cloud, though northern and northeastern regions may see isolated showers. Light winds overall, ...

O2 is one of a growing number of mobile networks that lets you use an eSIM (also known as an embedded SIM) rather than a removable SIM card. There are lots of advantages to eSIMs, including them ...

Removable SIM cards are ancient by technology standards, and the next step is now here in the form of the eSIM, which is short for embedded SIM. These are built into phones and can be rewritten to ...

Consumer mobile provider giffgaff, which is a virtual mobile operator (MVNO) on O2’s national 4G / 5G network that is also owned by Telefónica UK, has this afternoon expanded the availability of their ...

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If you've just got your hands on a shiny new Sim card, congratulations. Switching your Sim (the chip that dictates your allowance) can unlock huge savings. Now comes the crucial step of activating it ...