I don't have an opinion on which carrier people should use, but if you're on a grandfathered plan, and they tell you "the new one is just as good", they mean "it's just as good, but it has a clause where we can change it, unlike the one apple forced us to give you years ago"
notice how none of those reviews mentions the noise cancellation that only emphasizes continuous noise, while allowing all other sound through? I am very aware of inner fidelity