O2 down: 4G still not working and company does not know when it will come back online amid data chaos

O2's data network has been offline for more than 12 hours and nobody appears to have any idea when it will come back online. Both the network itself as well as Ericsson – whose software appears to be to blame for the problems – has repeatedly committed to bring the data service back online as soon as they can. But neither has offered a specific timeline for when the fix will be in place, or any real detail of whether it is close to fixing it. The network's chief executive, Mark Evans, gave the latest statement on the ongoing outage. But he failed to give any detail on the problem itself.