A number of devices including the three-year-old Samsung Galaxy S5 is getting an August patch that address some security issues. For the Galaxy S5, it’s getting version G900FXXS1CQH1, which comes in at 75MB and has been coming to S5 units in Europe. The Galaxy S6 line on AT&T is getting the update too as version G890AUCS6DQH1 for the S6 active, G920AUCS6EQH1 for the S6, G925AUCS6EQH1 for the S6 edge, and G928AUCS4EQH1 for the S6 edge+.
A non-Samsung device is also getting the update, too. The Nexus 6 on AT&T is getting the August patch as version N6F27I.
Source: GSMArena