Hi, I bought a AX1800 deco x20 because i wanted a mesh wifi that takes a SIM card as input instead of an ethernet cable. It seems that what I received (set of 3) only takes ethernet cables. I'm kind of confused about that but mostly would like to figure out what my options are now. Can I buy another X20 module that takes a SIM card and then mesh it with my set of 3? or should I just return the set of 3?