(Sony closed all their US retail stores) -> think they're keeping the LA and NYC store... but the new phones reach the retail stores very very late

looks like the Docomo model for the Z5 premium is SO-03H.

Typically, I look at the Sony whitepaper for the full specs... but the whitepapers don't list the model yet

http://developer.sonymobile.com/down...p-whitepapers/

there is almost zero LTE-band overlap with USA networks. I'd suggest to avoid this model
1, 3, 7, 17, 19, 21, 28, 38, 39

https://www.nttdocomo.co.jp/product/smart_phone/so03h/