Why I didn't get nougat update on my devices samsung s7 edge SM-G935FD

[AC Question]

From 2 weeks I bought 2 samsung s7 edge SM-G935FD (United Arab Emirates) .
One of them got the nougate update and from 3 days ago get the 7.1 nougate update, the other one didn't received any update and if I check manually its say :"The latest updates have already been installed Current version : G935FXXU1BPLB/G935F0JV1APC8/G935FXXU1BPJJ
Is there any problem in this device ? should I return to store and replace it with another phone ?
Why the first one got the update and the second not even they have the same model number and country ? .

And should I download manually the nougate firmware from a site and install it to my phone ?

 

[Tim1954]

You should wait patiently until you get the update... They stagger the OTA update releases so they don't overload the servers. Be patient.

 

[paulie7880]

Oh, there is a 7.1 our there? Didn't know that. Verizon just gave me a 7.0 update this morning. But then Verizon is always late.