mine is a model n889 i see theres an fn and f2 key but neither do anything when i press them

[Laura Aleo]

mine is a model n889 and have both the f2 and fn keys but i cannot see anything happening when i press these keys,,,do i press them together or one right after the other

 

[Laura Aleo]

im trying to get the wifi to work ...it was given to my kids