Here is the original source article:
* The monsters you take into the random dungeon affect the tablets you find
* "Streetpass" specifically evokes mention of local wireless (Tag mode).
* No mention of NWFC on that source article at all.
Did Siliconera get it wrong?
There's this part in the translated article:
The characters who live in town and immigration lithograph passing, seems to be able to exchange my Internet communication
Near the bottom of it above the copyright.