Unable to connect Chamberlain garage door opener via 5g internet

First of all, I separated the 2.4 GHZ network from 5 GHZ network from t-mobile internet app (choose network you will see the option). All I did was to reset extender to factory default setting then I can use my laptop to connect to the extender network, and a simple configuration screen shown up. The very first step was to let me pick which WIFI network extender should connect to. I picked the 2.4 GHZ one from T-mobile home internet router. Then provided password for extender to connect. Now I have chance to pick a name for extended WIFI network. 

Now I have extender WIFI network created and be able to connect to through phone or laptop. 

I went to garage, reprogram the WIFI to connect to this extended network. Garage has no problem to connect to this network. Everything comes back green.

You might need to download a manual of your extender to find out how to reset to factory default settings and configure an extended network for use.

All MyQ needs is at configuration time to use port 8883 to connect to your router or extender to register. A router or extender works well for this purpose. But extender is cheaper and easier to place closer to garage. Mine just needs a power plug.