O2 Network Crashes, O2 Really Doesn't Know Why

The O2 mobile phone network in the United Kingdom crashed July 11, 2012, and company executives said they didn't actually know why it happened.

Separately, In France, the France Telecom mobile network had a national outage of the voice and text messaging network affecting 28 million users on July 6 and July 7, 2012.

Of course, millions of U.K. customers (O2 has 23 million customers in the United Kingdom) were affected. But that's not even the most important fact about the outage.

O2 said it did not know when the problem would be fixed, in part because it wasn't exactly sure what was happening, in the core of the network, to block calls and access, other than that it appeared to be a signaling issue.