sa about > software update kapag walang update ibig sabihin hanggang diyan nalang ang version niyan at kahit saan ka magsearch ng higher version. wala kang makikita , pwede ka mag custom rom (kaso expect mo ang madamng bug)
Check mo sa XDA if may Custom ROM para sa device na yan, Using a custom ROM can allow you to enjoy the latest version of Android for a long time after the device has reached the end of its useful life.
Latest update on your sm-t211 is discontinued or no longer being developed/worked on, lastly updated was 2015, at base sa nabasa ko lahat po ng custom rom ng device mo is KK (kitkat only)