Update to MM expected in may...

[ivanox1972]

As latest leak suggests, tab s2 is one of rare Samsung devices to get mm for sure
http://www.androidauthority.com/samsung-marshmallow-update-roadmap-677528/

 

[mankvl]

Nice, just got my 710 was rly disappointed when I didn't get the 5.1.1 update, and OTA was saying you are on the latest firmware, will try Kies but I guess I will have to flash with Odin my self

 

[damador]

samsung says 1 rd quater 2016 for new nad old devices like galaxy s5 ..

 

[DeeXii]

Nice, just got my 710 was rly disappointed when I didn't get the 5.1.1 update, and OTA was saying you are on the latest firmware, will try Kies but I guess I will have to flash with Odin my self

Use "SmartSwitch" which replaced Kies.
It will give you BOJ1...
There is also an even newer firmware from December BOL6 which is on Sammobile. It came via OTA but not sure why its not automatically downloading.
Currently sticking with BOJ1 until I can figure out what is up with BOL6.
I did update my mom's S2 to BOL6 and it ran fine.

It should be noted that there is no source yet for BOL6 as its fairly new. I have requested it and it will be released soon.
But that means there is no kernel for root. One could use the older firmware root kernel and it should work fine but I find it best to always use the correct kernel.