It didn't matter in my OP, as I was just trying to figure out how LTE worked.
I went through the wikipedia page on LTE:
http://en.wikipedia.org/wiki/3GPP_Long_Term_Evolution
According to wikipedia: "LTE is, therefore, anticipated to become the first truly global mobile phone standard.".
How can it be the first truly global mobil phone standard, if there's more than one LTE standard?