You cannot change the LTE bands that are installed on your phone. It's hardware based.I live in spain too and I hate not using the LTE.
I upgraded from a iphone 3G and didn't know anything about the bands.
But, if I can change the bands around to 1800 or 800, I should have 4g LTE. Is this possible? Can anyone give anymore info besides post in the JB section?
OP have you figured a way how to do it?
I'm very interested.
Tar heel blue