"We're continuing to drive the recovery of this issue " said the O2 website in a twist of public relations gobbledygook. The network's 23 million UK customers were told at dawn: "Unfortunately we're unable to confirm any timescales for service restoration".
Not all users are hit by this crash - but many thousands are. The latest information is that 2G is now working - but 3G is still hit.
O2 also run networks for Tesco and Giffgaff. GiffGaff said today:
See ITV Lunchtime News at 1.30 for more information. If you have a problem with your O2, please email me at Chris.firstname.lastname@example.org.