I have to Iphone 4 in Egypt , one is mobinil and other is Vodafone. Both on ios 4.3.5. When I tried to use facetime , mobinil one work probably BUT the vodafone one error "waiting for activation"
iPhone 4, Other OS
Where did the iPone that won't activate come from? If you got it from Vodaphone, I'd contact them. If you got it elsewhere (out of the country) then it's possible it's trying to send an international text message to the mothership to activate facetime. If you can't send International text messages, it will not be able to activate.
I would ask vodaphone
I can't activate facetime in egypt using vodafone
