Crazy to hear its not so grand where you are. I can not remember falling back to 3G lately at all on the north end of Midtown. Only issues I have had are between stations underground on the MARTA. Other than that, I had no issues between the north side of Midtown and where Gus' Fried Chicken is (which I may have visited twice last week lol.)
These two would never be imposed conditions. They're too open to interpretation to enforce. As it stands T-Mobile already tries to act like they're coverage is as "good" as Verizon when we all know that to not be the case.