Home Internet and wifi extender

I did not do anything special. I connected one Airport to the T-Mobile gateway with an Ethernet cable, and I set up the other Airport as a wireless extension of the network. I have since stop using the Airports and I sold them. I did a bunch of testing placing the Gateway in different locations in my large house. I found that smack dab in the middle is the best. I get better speeds with it there even though the signal gets reduced on the outer fringes of the house. I cannot connect to my network if I am in my concrete bunker storage room, but that's ok since I don't spend much time in there.

The best solution will be the time when T-Mobile offers some type of Mesh extender(s). I see this in my IP web address setup, and on the Home Internet apps too.