Can a TELUS B20T hub serve as a wifi extender?

Hello:

I am new to this forum and after having read some posts here I realized that I actually have no idea most of the terms people use so I hope my question is not too naive:

I have a TELUS B20T modem and for some unknown reason none of the ethernet jacks in our new home is working (building issues, not network issue since none of our neighbours' ethernet jacks works) so we 100% rely on Wifi. 

I want to enhance the wifi strength in our basement (the modem sits one floor up) and wonder if I could use an additional B20T as a wifi extender?   Does that create more work for me than simply getting some TELUS boosters and what benefits does this have over simply using boosters? 

If I do choose to use a second B20T as the wife extender, do I need to connect this second B20T to the primary hub's network access hub with an ethernet?   Any comments or suggestions will be much appreciated.  Thank you.