@Benwood118 It should be in the app on the phone. Open Deco app, Select More from the bottom right, new Deco app page will open, make its screenshot and post here. Also, while in More, open Advanced,...

@bites You should replace Ethernet cable which links Main Deco to ISP modem/router.

@Benwood118 It is called QoS. You should set this parameter values to 600 for download and for upload. See this: How to set up QoS on the Deco If that does not help and speed is 90, replace Ethernet...

@MJ-UK You can connect Deco devices with Ethernet. This topic is discussed here: General questions about Ethernet Backhaul feature on your Deco Scroll down to Q4 in that document, it answers your...

@a_sh Thanks. Will wait on your update for #1 and #4. For #1, ISP Router brand and model name can often be found on the label on the bottom of the router. Please also do the following two...

@Don_Bro You can add Deco X50-Outdoor to your Deco E4 WiFi mesh and they will run together. It would make sense at some point to also replace E4 with 3-unit set of Deco X50 or Deco X55. This will...