I have a Samsung-sm-g870A unlocked ATT phone how do I get the marshmallow 6.0 update

[AC Question]

How do I update to the marshmallow 6.0

 

[mhinc]

How do I update to the marshmallow 6.0

Download Samsung Kies for your PC or MAC. Plug in the phone and you should be able to grab the update based on the phones original provider it was locked to. IF they have updated the S5 Active yet. I know many have but not sure of the phones original provider so not sure

 

[anon(632115)]

You will need a valid AT&T sim card or take it to a Best Buy. AT&T fw is not available anywhere and Kies/Smart Switch doesn't work on these devices