you said RM680 is probably a N7 running symbian , now post you facts to back it up. btw don't make fun of my English when based on your last couple of posts you do not know the different between which and what.
[...] btw, could be the N7 (X breeding between N8 & E7)..[...]
E7 (a business phone) has hw keyboard. T7 seems indeed to be a cheaper N8 (and without hw kbd) N7 would be (at least) E7 + mSDHC slot thus including the hw kbd, as RM-680 / FCC seems to have
T7 & N7 do not exist where is your info coming from?