Unable to connect Chamberlain garage door opener via 5g internet

First, on T mobile internet app have the option to select 2.4 or 5G.

but I follow some places instructions 

So, I used Netgear EX2700 (Working only 2.4G, and setup with IPAD and everything go smooth. 

For whom says that T-mobile  need to find solution, I said: 2.4G its history, 

MYQ stay behind! and one day they will found themselves out of the market because new companies comes already with solution