Not necessarily. Some people travel to another country and want to use the iphone as a camera. There is something else you can do also. When you turn on airplane mode, you can then enable wifi after turning airplane mode on, then you can use imessage and can access the internet. This is a way that you can make sure you arent getting charged or hitting any fees of any types internationally, while still using the iphone for some of these types of things. Its a way you can take phone and post to facebook or post on twitter or instagram, send imessages, and yet you know for sure you aren't getting charged for anything.