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 ...

Having worked at the BBC and in commercial radio before joining Which?, James produces our always-on podcasts, and oversaw the launch of our member-exclusive podcasts in 2025. Save article Set as ...

Plus some essential advice to save money on your mobile when going on holiday this summer *All recommendations within this article are informed by expert editorial opinion. If you click on a link in ...

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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 ...

Virgin Media O2’s 3G network has already been switched off across parts of the UK. Mikael Buck/Virgin Media O2 Virgin Media O2 is pressing ahead with the shutdown of its 3G network across the UK, in a ...

Chiara is an award-winning investigative reporter who specialises in banking and fraud, joining Which? in 2015 following six years as a personal finance journalist at a national newspaper. Save ...

So I've been seeing a lot of complaints around the forum recently with regards to O2 failing to process orders, sim card compatibility with 5G and other things. As I'm also one of these people ...

I really thought transferring my O2 eSIM from my old iPhone to my new one would be quick and simple... but no. The transfer request has generated an order number that could take 24 hours to process.

There's only one major network that hasn't reintroduced roaming after Brexit HOLIDAYMAKERS will be able to manage their spending better from October, thanks to new rules around roaming fees in Europe.

Virgin Mobile is ahead of most MVNOs (mobile virtual network operators) in at least one way – namely that it supports eSIMs, where most networks outside the big four don’t currently. An eSIM is an ...