Sorry, I somehow missed that... getting blind in my old age! I think Samsung is the one that needs to push the update to the tablet. You might contact Samsung. Or, you might check Sammobile to see if there's an update you can install manually via ODIN. Enter your model number at the Sammobile link.Hmm? WiFi only.
It's not recommended you flash firmware from other regions/countries/carriers... you can brick the device. I'm not saying it can't be done, as many people have flashed firmware not specifically released for their device, however, it's best you check out XDA Tab S2 forums to see if anyone has done it for your particular tablet/model. XDA is the premier site for this sort of thing.Do you know, can I use Odin to flash a 6.01 from, say, United Kingdom?