I found a work around for not being able to update main router. first update satellite routers by using their IP addresses Set one of the satellite unit as the primary unit then access the primary...

For whatever reason, I can't even login to my router to downgrade. Multiple reboots, still not able login to tplinkdeco.net or the router ip. anyone?

@JDub2899 i am running wireless backhaul and both satellite routers disconnecting after few hours like others said. Poor quality control.

I returned my M9 plus to Costco today. Lack of communication on missing features is too much of a concern for me. I am sticking to my good old Orbi.

Update on this please? Want to setup VPN tunnel at router level instead of setting up for each client.

M9 plus needs firmware update to same features as M5. It's arleady been months since M5 got it so no reason why you can't push this to M9 plus. I bought 3 pack M9 plus from Costco, if no update or...