T-Mobile USA, PLEASE PLEASE PLEASE PLEASE bring back activations for Non-VoLTE phones

First off -- I HATE having my time wasted -- typing in a texted code (despise it) when not everything NEEDS to be THAT secure. (just ask for my dog’s name).

I didn’t apparently adequately describe my issue(s) with -- “Activating a bring your own device”.

My present -- current -- ancient TM phone (Note 3) to which I just added $300 in the TM account -- is NOT FULLY compatible with the NEW (greedy, selfish) LTE requirements

-- Extended LTE

-- VoLTE

and does not have them -- but works on the TM network without them.

So, could MANY (many) other devices -- as mentioned above. I just bought a new (used) Samsung Xcover Field Pro -- way, way, way better than my ancient Note 3 -- and cannot use it on the TM network -- for not having -- 

-- Extended LTE

-- VoLTE

My present phone does not have (nor do I need or am willing to pay for).

SO, if this isn’t about -- selfish TM greed (and throwing older phones in the pacific ocean) -- why not let new “Bring your own phones” operate using that part of the TM networks -- that works -- and still produces revenue (like my $600 per year)?

My question should be -- Are there any work-arounds in firmware or other “patches” to make these perfectly good phones (not yet in the Pacific Ocean) work on the TM network?

Gracias.