T-Mobile 5G Home Internet & TP-Link Deco Mesh WiFi System (Deco S4)

Yes-works perfectly!  I just switched from Cox Internet to the T-Mobile gateway. I had my cox set up with the deco S4 working perfectly. I needed to have the Deco mesh router coverage with the T-Mobile gateway. At first I was disappointed because I thought gateway wasnt  connecting to Deco. However, T-Mobile support hooked me up directly with the TP Link tech support who walked me through the process of setting up a new network since the previous one would only function with Cox. In short, you have to reset each router and use the TP link application on your phone to establish a new network. 

I worked with Hans, who was an excellent support. He gave me TP links direct number. If I ever needed future support. here it is: 

866-225-8139

TP Link Customer Service