The address of residence is nothing to do with it. The issue is losing data, music,etc. when you change App Stores. If you scroll back through this thread you will see that many, many Swiss companies makes their apps available in international app stores, and even some of the other Swisscom apps are available internationally!!!
I still do not understand why it is so difficult for Swisscom to make this change and serve your customers!
Regards,
Davy