Early on Thursday morning, the O2 network experienced some issues. Our priority is to restore full data services on the network by tomorrow morning. Our technical teams are working extremely hard to resolve this.
Customers on other mobile networks such as Sky, Tesco and Giffgaff have also been affected by the problem because their networks use O2 services. "We fully appreciate it's been a poor experience and we are really sorry".
"During the course of December 6, most of the affected customers' network services have been successfully restored", Ericsson explained.
"We apologise for any inconvenience", the firm said, after problems were first reported at around 5.30am. For the millions of users who are out and about and rely on smartphone maps to get around, it's worth considering that apps like Google Maps allow customers to download maps on Wi-Fi and view them offline. However, some customers are reporting voice issues as well.
O2 said it will be sharing updates on its website when the service changes.
O2 is investigating reports of issues when using 3G or 4G data, adding that "voice calls are working OK".
Ericsson has identified an issue in certain nodes in the core network resulting in network disturbances for a limited number of customers in multiple countries using two specific software versions of the SGSN-MME (Serving GPRS Support Node - Mobility Management Entity).
The company, the second-largest mobile network in the United Kingdom, said it was investigating the technical fault.
'We have been working hard on resolving the United Kingdom data issue since early this morning.
Thousands of angry customer have been complaining to the mobile network since the problem started at around 6am this morning.