Hello all, I'll be traveling to europe from the US next week. I was going to go the route of using local sim cards, but I'll be moving around so much that it's just gonna a hassle I don't want to deal with. So, I'm just going to turn on the ATT International plan, and turn off all data usage on my phone. I'll make most of my calls over Skype/facetime. However, I do want to use my maps and GPS. Can that be down without using cellular data? Any pointers?