I don't use Facetime often, but a friend of mine just purchased an iPhone 4 and wanted to try it. When going into the contacts, I noticed all the Facetime buttons had disappeared, so I went into Settings, Phone, and enabled Facetime.
For the last 12 hours or so, it's been hanging on "Waiting for Activation". I've disabled and enabled it a couple of times, but don't want to do that too often in case it is sending an international SMS every time I do.
My wife's phone was working fine with Facetime, but after she disabled and enabled, hers is also hanging on "waiting for activation".
I'm wondering if anyone else is seeing this, and if so, whether the problem is with Apple's SMS server or Vodafone.