This is definitely the final word I'll have on mobile phones.
If the plane landed near a phone mast and if the hijackers hadn't removed everyone's phones, then it's certain that the phones would connect with that phone mast. The phone's location would rapidly be known because 'they' would know which mast the phone ha dconnected to. The plane must have landed a week ago if it did land.
In that case, the plane and its passengers would have been located a week ago and we'd be seeing a happy ending on CNN.
So very, very clearly - as clear as can be - that is not the case.