dont think it can be done, but is there anyway to start a facetimecall using the back camera... calling a friend at work showing a glass of guiness etc. 
if you´re really fast u can switch once the person answers but there is a delay
(didnt think i would use ft very much since we´ve had videocalls many years here in Sweden, but its actually really cool+ free
if you´re really fast u can switch once the person answers but there is a delay
(didnt think i would use ft very much since we´ve had videocalls many years here in Sweden, but its actually really cool+ free