O2 has issued an urgent warning to consumers regarding a new phishing scam that attempts to steal login credentials ...

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 ...

Experiencing that frustrating moment when your device displays “SIM card not detected”? You’re not alone; this is a common problem for smartphone users across the globe. Whether it’s a temporary ...

Mobile network provider O2 is urging people to stay alert after fraudsters began sending fake messages claiming customers must accept new terms and conditions or risk having their SIM card switched ...

Here are the best eSIM providers in our ultimate guide. Compare plans, coverage and features to find the perfect eSIM in 2026 ...

It's not a secret that phone theft continues to rise. Recent figures show a whopping 117,000 smartphones were stolen in London alone last year, with that figure expected to be even bigger in 2025.

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 ...

Stephen said dealing with the fraud had taken him seven hours a day to resolve since it first began three weeks ago A man targeted by fraudsters who got his mobile phone number from an energy company ...

‘Sim-swap’ fraud has affected three readers – and dealing with their mobile phone company hasn’t been easy What some O2 customers may have wanted for Christmas was a phone number, since long-cherished ...

You need a PUK code to unlock your phone, but how does it work and where do you find it? Here’s what you need to know. A PUK (personal unlocking key) code is a code that helps you unlock your mobile ...

What does it mean if a phone is locked? A locked phone is a mobile handset that can only be used on one network. Until recently, networks sold these phones as part of a contract deal that also ...

A SIM swap fraud, also referred to as "simjacking" or "simcard hacking," occurs when malicious actors deceive a cellular service provider into transferring a victim's phone service to a SIM card under ...