Thank you for your reply! I've done a little bit more research and yes I was really seeking informationabout the bands not the charges … Sorry if I was unclear.. anyway, nice to hear that the Mrs. iPhone 6 works well in Europe.I did a further investigation after reading the complete wiki and found this link. If you enter the country in question and scroll down to the bottom you could enter your device to see if it's acceptable there:

www.t-mobile.com/coverage/roaming?country=Portugal

this is an example for Portugal, very easy to change the country as well.Thanks again…