If it's not as big of an issue as the "few" who are experiencing the issue. Why a press conference? And why, as reported, does it appear that there will be a potential fix/recall. If nothing is wrong with the phone and only a small group of people have been affected - then surely that's overkill, no?
It's a PR mess. No doubt about it
We're assuming (with good reason, of course) that the conference is about the antenna issue. I think they have to address the angry mob of villagers armed with their torches and pitchforks, even if that mob is a relatively-small percentage of their customers. Angry mobs don't always represent any kind of majority, of course, but they are loud enough to need attention.
From a PR point of view, it shouldn't have come to this. However, I don't think the percentage of people adversely affected by this is all that significant compared to those who are quietly happy with their purchase.