O2 is one of the leading telecom brands in the U.K., providing mobile SIM card and broadband services. As a customer, it allows you to customize your monthly plan according to your needs. If you have ...

I was told I had to take a 'free' Sim card to renew my TV and internet package deal - but it turned out it wasn't free at all.

The bus Countdown display, as TfL calls them, uses an O2 SIM card to connect for updates, meaning they're not getting real-time information.

O2 is set to shut down its pay-as-you-go data-only mobile SIM service later this month, a move that will affect those who currently rely on these SIMs for internet access.

O2 is to disconnect the Sim cards used by Swiftcall customers to route their calls to mobile numbers using a technology known as GSM gateways. The disconnection will take place at some stage next ...

O2 has admitted to deliberately slowing down customers’ mobile internet speeds. The mobile operator has been throttling network bandwidth for people roaming in the EU.

For just £15 per month, an O2 sim only deal gets you 100gb of data, unlimited texts and calls, six free months of Disney Plus and up to three free months of Apple Music.

If you've joined O2 as a pay monthly customer, there's no need to activate as you can pop the Sim card into your phone and it'll work straightaway. The process is slightly different if you're a pay-as ...

Have a new phone and wondering how to activate your SIM card? Get all the information you need in our SIM card activation guide.

To speed up the process, the network is introducing a new service called O2 WiFi Extra, which automatically connects customers with an O2 SIM card.