got my SH ONT 5gbps activated today.. very efficient process, SH technician used his own laptop with additional thunderbolt LAN 10gbps device to speed test showing 5gbps download and upload by connecting directly to Nokia (modem?)
and alas.. my AC68U cant turn on at all
so now using my linksys WRT1900AC temporarily and it is so slow 
and alas.. my AC68U cant turn on at all