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O2 hit by severe 4G network outage across UK

O2 is experiencing a severe outage to data services with customers across the UK unable to access 4G and network features since early this morning.

Users have been reporting issues since 04.45 today, according to system information site DownDetector, which shows a spike of complaints and severe outages across the entirety of the UK.

O2 hit by severe 4G network outage across UK

O2 confirmed it was aware of difficulties with its data services in a tweet sent this morning at approximately 07:30, and subsequently confirmed the source of outage lies with a software issue in a third-party supplier's IT system.

While data services such as 4G are out of action, the network operator confirmed voice calls and text messaging was working as normal, but several users have complained they do not have phone signal either. IT Pro approached O2 with further questions but did not get a response at the time of publication.

While it's unclear exactly how many users are affected, the outage has also hit customers signed-up to mobile operators that use the O2 network, such as GiffGaff and Tesco Mobile.

According to Telefónica, O2's parent company, approximately 32.1 million people use the network, with the parent firm claiming to be the UK's "largest mobile network carrier".

But the issue isn't just isolated to consumers, with organisations and public services also affected, including Transport for London (TfL), which use the O2 network for its signalling and communications.

The organisation confirmed on Twitter countdown tickers used by buses across London is currently experiencing difficulties with limited information being shown to commuters on screens at bus stops and on mobile phone apps.

The networking giant is asking its customers to rely on Wi-Fi for now, while asking them to review its status checker for updates.

IT Pro was only able to access the site intermittently, however, presumably due to a vastly-heightened volume of traffic the website is coping with.