but how exactly do SIM cards work? What's so special about those little SIM cards that enable your phone to access a wireless network? We'll explain. A SIM card is essentially an authorization or ...

SIM cards have been an integral yet forgettable ... with the caveat that certain network functions will understandably not work. For instance, you can still connect to a Wi-Fi network and access ...

O2 seems to be an outlier though, as Three, EE and Vodafone all claim that your current SIM card will work for 5G. MVNOs such as Tesco Mobile also claim that you won’t need to switch SIM card, though ...