MIMO antenna for T-Mobile 5G home internet gateway?

TwoCutes wrote:

Hola all - 
New T-Mobile home internet user, here.  I set up my 5G internet gateway (silver cylinder) this weekend and it works just fine.  I have Frontier DSL and Charter Spectrum now and T-Mobile is currently way outperforming Frontier DSL and outperforming Charter Spectrum almost always.

I found this article about installing a MIMO antenna using the internal gateway ports. 

https://www.waveform.com/a/b/guides/hotspots/t-mobile-5g-gateway

Has anyone tried it?  I would be interested in experiences and results.  ¡Gracias de antemano!

I have it worth every penny if you are not getting good signal as is.

If you use the search I am sure you will find my countless post on it.