A point I haven't seen discussed is the Moto G's wifi. Specs say 802.11n, but one review says it's dual-band wifi. I'm confused. I thought a device had to be 802.11ac to manage the 5Ghz band. My 2013 Moto X was one of the first to handle 802.11ac, and I really don't want to give it up (live in a very active 2.4Ghz building). What's the situation?