I have just got a new Samsung GALAXY Tab 4 7.0" (SM-T230NU).
What is the difference (or improvements) between the 'stock' SM-T230 model GALAXY Tab 4 7.0" and the 'newer' SM-T230NU, recently released for US/Canada and in EU?
Are there also other NU devices? I have also seen references to the GALAXY Tab 4 10.1" as SM-T530NU.
I have found one possible issue, with the SM-T230 not having multi-user mode:
The multi users setting is not available. According to the manual it should be at settings => General => Users.
(My device does have multi-user capability)
I also saw a reference to the two different models on XDA Developers:
Do make sure your tablet is a T230NU model and not just a T230 model.
There are three variants: T230, T230NT, T230NU