My unlocked ativ S on GDR2 is downloading an update!
I'm curious to what it might be.
Edit - Same as others, I get error 8018830f after a while. I hope this is WP8.1 and not a very very late GDR3.
No, it is not WP8.1 cuz Samsung haven't yet rolled out its own WP8.1 firmware. The only way to get WP8.1 on Samsung ATIV S is through Developers Preview thing, which is just a generic WP 8.1 without a proper Samsung WP8.1 firmware and it will work on your last Samsung firmware. For example, if you from WP8 GDR2 go and install WP8.1 DP it will work on the firware from GDR2, same goes with GDR3 too. What you is getting is probably (99%) the GDR3, which if you manage to install it, trust me, your phone will work way better than on GDR2, and in GDR3 you will have option to close the apps from multi-tasking window among all other advantages you get with it.
How to change my csc to ETL??? My ativ s only got ZTO csc (brasil) �� and i'm using wp 8.1 preview.
Read the last 3-4 pages of this thread, I think some guys here talked about this matter, or if you have time read this whole thread, we've already talked about this, especially i have tried to help other Brazilian guy with the same ZTO CSC, but i think that the ZTO CSC in Brazil got only up to GDR2 if i am correct. I think links have been posted in some comments here too, but i am too lazy to search them now, and its 4am here so i need to get my sleep.
Good luck anyway