I don't know why companies make exclusive deals like that with carriers. Samsung is losing out on a ton of sales from other carriers.I don't think I will ever buy another active series phone as long as they are only att exclusive , not enough aftermarket made for them.
Yes you are correct. No removable battery or expandable storage in any of the S6 variations. However, the battery is so big in the S6 Active, that not having a removable battery doesn't bother me at all. In fact, I would prefer not being able to remove the back panel because I've been so paranoid about it on my S5 Active with regards to something getting into the gasket area and leaking water.I prefer to have a phone with a changeable battery and expandable memory. I doesn't look like either is available on the S6A if I am reading the specs correctly.