I purchased Samsung Galaxy Tab 3 (Model SM-T211) and I am searching for Radio in the Home Menu. Does the Tab 3 have radio functionality?
I own a SM-T211 myself. There is no built in radio functionality for this device.
However, you can install internet-based radio apps from Play Store. Hope it helps.
As a side note, a quick search for the Galaxy Tab product line on PhoneArena reveals that none of them, starting from the first to the fourth generation tablets, have radio functionality.