That page suggests you can only complain if you've been personally affected. Although I've been on O2 in the past, I don't have any evidence that the problem o

That page suggests you can only complain if you've been personally affected. Although I've been on O2 in the past, I don't have any evidence that the problem occurred during that time. I'm on Orange now, which appears to be unaffected. It's a pain, because I'd been thinking about switching back to O2 to get Visual Voicemail, which no other UK provider appears to be able to support.