O2 restore 3G data and 4G on the way after outage

O2 network outage over as UK 4G restored

O2 has said that the software issue that left millions of customers unable to use any data services worldwide yesterday was down to a flaw in Ericsson certificates.

SoftBank said earlier the outages stemmed from problems at exchanges for its high-speed wireless LTE network - known as 4G.

The issue has since been resolved after one day and O2 has assured its customers that its technical teams will be keeping a close eye on service performance and are conducting a full review into the cause.

As per Ericsson's analysis of the mobile networks' outage incident, the root cause behind it was an expired software certificate which led to the shutdown of affected network equipment.

The network blackout also affected companies that share its networking, including - Sky, Tesco, Mobile, GiffGaff, Lycamobile, and many other companies that rely on O2's connection.

O2 said this morning that its 3G and 4G data services are now performing as normal and its technical teams are continuing to monitor service performance closely.

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The two firms said: "We fully appreciate it's been a poor experience and we are really sorry".

O2 said it would update customers later on Friday on how "we will make yesterday's data service issue up to them". "We are working with our service provider to resolve this as soon as possible".

The company said, 'During December 6, 2018, Ericsson.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)'.

"I want to let our customers know how sorry I am for the impact our network data issue has had on them, and reassure them that our teams, together with Ericsson, are doing everything we can", said Mark Evans, CEO, Telefonica (O2) United Kingdom on Thursday. Ericsson confirmed that an "expired certificate" in the software caused the outage impacting services in the United Kingdom and Japan.

She added: 'Ericsson sincerely apologises to customers for the inconvenience caused'.

Börje Ekholm, President and CEO of Ericsson, said: "The faulty software that has caused these issues is being decommissioned and we apologize not only to our customers but also to their customers".

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