Software Issue Triggers Major O2 UK Mobile Data Outage UPDATE2

Mobile operator O2 (Telefonica) confirms that an unspecified “global software issue” has been identified as the cause of a major mobile data (mobile broadband) connectivity outage on their national UK 3G and 4G network this morning. Mobile providers in other countries are also believed to be affected.[1] The problems appear to have started just before 6am this morning, although contrary to O2‘s statement we’ve noted that a sizeable number of their customers are also reporting difficulties with making calls and or sending text messages.

In response the operator appears to be encouraging their customers to use WiFi[2]wherever they can” instead. Unfortunately the outage also appears to be affecting customers of O2 based MVNO brands (e.g. Sky Mobile, Tesco Mobile, giffgaff[3] and Lycamobile etc.) and any external services that rely on the operator’s data network (e.g.

Transport for London’s bus timetable displays).

O2 Service Status Update[4] We’re aware that our customers are unable to use data this morning. One of our third party suppliers has identified a global software issue in their system which has impacted us.

We believe other mobile operators around the world are also affected. Our technical teams are working with their teams to ensure this is fixed as quickly as possible. We’d encourage our customers to use Wifi[5] wherever they can and we apologise for the inconvenience caused.


UPDATE 11:46am O2 have issued a new status update, although it’s still saying broadly the same thing but with different wording.

O2 Status Update The network issue we are currently experiencing remains a top priority for us and we are working as quickly as possible to fix the issues.

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. We believe other mobile operators around the world are also affected. We apologise to our customers for any inconvenience.

UPDATE 12:51pm

The fault appears to stem from one of Ericsson’s software systems.

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  1. ^ mobile broadband (
  2. ^ WiFi (
  3. ^ giffgaff (
  4. ^ O2 Service Status Update (
  5. ^ Wifi (

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