Looks like it's the international (non-US) version. From the wiki page[0] of the device:

> So far, what works for Samsung Galaxy S III LTE (samsung-m3) also works for the samsung-m0 (Galaxy S III international GSM version without LTE, Also known as Galaxy S III 3G SHW-M440S in South Korea) and samsung-shv-e210s (a Korean variant). (None of these S III models should be confused with the North American S III models, which require OS builds.)

[0] https://wiki.postmarketos.org/wiki/Samsung_Galaxy_S_III_(sam...