Doing a Mediterranean cruise and have a iPhone 4 with firmware 4.12.01. Just would like to know what my options are with this phone. Would like to take it with in order to keep in contact with our group when necessary. Wouldnt be using it for anything else as we will have an iPad for the internet. In doing research on this; it appears that some sites say they can unlock the phone; whilst some individuals say it cant be done. I have contacted my provider ( Telus; Alberta; Canada) and they say they will unlock the phone for international travel at $50.00 a pop! Problem is; there are 5 iPhones in the group; mine being the only iPhone 4; the others are IPhone 3. Than there would be the cost of subscribing to a phone service for all 5 iPhones. Would an App like WhatsApp be appropriate instead?