AT&T has started pushing out a new update to some Samsung Galaxy smartphones on its network. The devices in question are the Galaxy Note5, Note 4, and S5 Active, and the update they're getting includes February security patch. For the Note5, the update arrives as build version MMB29K.N920AUCS4CQB2, while the Note 4 and S5 Active are getting it as build number MMB29M.N910AUCS2EPK4 and MMB29M.G870AUCS2DPK5, respectively. The updates weigh in at 167MB, 137MB, and 187MB, respectively. There is no information on what other changes (if any) the updates bring along. Source 1 2 3 | Via
Source: http://www.gsmarena.com/samsung_galaxy_note5_note_4_and_s5_active_on_at_t_getting_new_security_update-news-23916.php