@cliffwilliams44 -- Revise history much?
Your assertions regarding AT&T are off by more than a bit.
The breakup into the 7 RBOCs allowed such innovations as allowing one to connect his/her own phone sets to the network. Which included the ability to connect cute little things known as modems -- remember them? -- to the network as well. This provided the incentive for manufacturers to create devices of higher capabilities than the 1200 bps boxes (and even slower 300bps acoustic couplers) that the original Bell system would limit one to; in short order 19200 bps modems became commonplace, and at very reasonable prices as well.
Independent service providers were allowed to connect to the network to provide long distance service at cheaper rates. Remember MCI? These service providers were also allowed to provide additional services not available from Bell. MCI, for example, provided the first commercially available e-mail service that interfaced the fledgling internet with the phone system. T1, then T3, and higher, data services were made available to the hoi polloi laying the groundwork for broadband communications as we know it today.
All this happenned long before "wireless", and certainly would have had to have happened before "wireless" could become a thing.
Were all these things "improvements in service"? YMMV, but for those of us who were there (and who lived through the growing pains), would have to refute your assertion that "The quality of service did not improve much", and say ," Hell, yes it did!"