I'd like to recommend creating a account so me or other members can assist you, as guest have limitations in replying here and if we need further Information to communicate with you.
I'll provide a link to register, please come back to your post so we can further assist you . Thank you
Check your particular carrier. Verizon and T-Mobile both have them. AT&T doesn't have them on their online store yet, but some brick and mortars have them. Sprint I'm unsure of. Best Buy has them also.
The LTE version will work fine over BT without activating. I can't answer your battery life question for sure because I don't have the WA 2 yet. I believe most people are getting 1 1/2 days to 2 days though.