Back in 2014, the Galaxy S5 became the first mainstream Samsung smartphone to feature water and dust resistance. The company also made a more rugged version of the device for AT&T in the form of the Galaxy S5 Active, which was followed by the Galaxy S6 Active last year, and t looks like a newer device in the Galaxy S Active series is in the works. A Samsung phone with model number SM-G891A was recently imported to India for testing – the Galaxy S6 Active had the model number SM-G890A, indicating that Samsung is now preparing an upgrade.
The minor change in model number suggests we could see Samsung upgrading the internals on the Galaxy S6 Active to bring them in line with the Galaxy S7/S7 edge – maybe a Galaxy S6 Active (2016)? The Galaxy S7 and Galaxy S7 edge are already water and dust resistant, but their metal and glass bodies mean they aren't rugged and leave a lot of room for damage from drops and careless usage. The SM-G891A could be the answer, though at this point we will have to wait and see exactly what the device will offer over the Galaxy S6 Active or Samsung's newest flagships apart from a sturdier outer body.
