Exia

Just wondering i did a reset on the R2, only way to set up the R2 is thru Ethernet cable to PC correct? I tried on Wifi on my mobile & seems not possible?

Im unsure for this setup i do have my isp router/modem for networking i wanted to connect my R2 in a single network. How do i correctly set it up do i need to log in my isp router & set it up ?