See the tear down/ Disassemble video of Samsung Galaxy note 4 by BCD Tech.
Tear down of Note 4 reveals that, the manufacturing cost is less than 250$. Samsung is making big profit from this phone. Still there is no sign of 4G connectivity on the snapdragon version. Neither in setting and nor in hardware I found 4G antenna on SM-N910G variant. Thinking that Samsung will come with some update to enable this feature later in this year.
Easy to tear as compare to S5