T-Mobile will officially charge just $650 for LG G6, AT&T offers BOGO deal off the bat
Technically, the LG G6 is cheaper at T-Mobile than AT&T, but the latter carrier offers by far the better deals, also kicking off pre-orders early.
LG Watch Sport antennas are in the non-replaceable bands
Maybe that’s why you won’t be able to replace them with other bands and why accessories manufacturers won’t be making any.