LTE and WIFI N need two antennas to get the fastest speeds, they use 2x2 MIMO which basically means they take the signal from two sources and combine it to be twice as big.
As for the BB, as SCVJEff said, their hardware is hard to compete with, but I disagree, the OS is still to this day the most stable and robust one on the market. However the reason BB failed has little to do with what they did but more to do with what they didn't do. End users just decided about 5 years ago that the most important factor in buying a cell phone was if it had a logo of a half eaten apple on the back of it and not and now that half eaten apple is starting to fall out of favor. Who knows, with anything in tech, when BB releases their Android phone maybe you will see a 2nd renaissance... but probably not. Keep an open mind, BB and MS phones lack only one thing, apps, which is very very important to most end users. The fact that their hardware and OS runs circles around Apple and Android means nothing compared to the fact that on Apple you can pay a dollar for the iFart app.