Ericsson: Expired Software Certificate Caused Those Data Outages

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Outage hits up to 11 countries


O2 and Ericsson have both released statements addressing the mobile data outage experienced by customers in 11 countries. Ericsson has disclosed[2] that: “An initial root cause analysis indicates that the main issue was an expired certificate in the software versions installed with these customers. A complete and comprehensive root cause analysis is still in progress.”

The main issue they say was in certain nodes in the core network which caused software versions of the SGSN-MME (Serving GPRS Support Node – Mobility Management Entity) to experience problems. Borje Ekholm, President and CEO, Ericsson, says: “The faulty software that has caused these issues is being decommissioned and we apologize not only to our customers but also to their customers. We work hard to ensure that our customers can limit the impact and restore their services as soon as possible.”

A spokesperson for O2 has commented that: “Our technical teams will continue working hard with Ericsson engineers to restore 4G which will bring us back to full network service. We will update our website and social media channels as soon as we have more information. We’re sorry for the loss of service our customers have experienced today.”

Data Outages Across 11 Countries

Customers across several mobile networks are experiencing complete data outages as Swedish telecommunications company Ericsson suffers an as-yet unspecified “global software issue” that has affected a reported 11 countries.

O2, Tesco Mobile and Sky Mobile customers have had no access to mobile data on their devices since Thursday morning. More than 40 percent[3] of the world’s mobile traffic goes through Ericsson networks. Japan’s SoftBank telecommunications corporation was also affected.

In a Japanese-language release[4] the company suggested the issue was with a global software update that affected “packet switching machines” and they had resolved it by restoring the affected software to a previous version.

Outage Update: One of our 3rd party suppliers has identified a software issue in their system. Our technical teams are working extremely hard to resolve this. We’d encourage you to use Wi-Fi wherever you can and we are really sorry.

— O2 in the UK (@O2) December 6, 2018[5]

An O2 spokesperson told Computer Business Review in a statement that: “All O2 technical teams are working closely with one of our third party suppliers who has identified a global software issue in their system which has impacted data services.”

O2 Down, Finger pointed at Ericsson

Ericsson informed us in an emailed statement that: “We are aware of the issue and are working together with our customers to solve it as soon as possible.” Their spokesperson would not state exactly what had gone wrong. Businesses in the UK are still experiencing data connectivity issues.

Transport for London is having difficulties keeping customers informed of live bus times as their Countdown System has gone down.

Countdown Systems – there are reports that live bus updates to our Countdown Systems has gone down. The company that updates the data to our network of Countdown Systems is currently experiencing difficulties in providing this service. This issue is being investigated.

— TfL Bus Alerts (@TfLBusAlerts) December 6, 2018[6]

Tesco Mobile has also informed its users via Twitter that their: “Technical teams are working closely with one of our third party suppliers who has identified a global software issue in their system.”

See Also: Huawei First to Trial Google’s Fuchsia OS[7]

O2 customers have taken to social media to voice their displeasure over the outage with many commenting that it is not just their data that is out of action, but they are unable to make phone calls over the cellular network.

O2 commented that: “As a result of this incident, we are experiencing a high demand on our network which means some customers may have issues making and receiving voice calls.”


  1. ^ Add to favorites (
  2. ^ disclosed (
  3. ^ 40 percent (
  4. ^ release (
  5. ^ December 6, 2018 (
  6. ^ December 6, 2018 (
  7. ^ Huawei First to Trial Google’s Fuchsia OS (

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