Describe and explain in detail the connection between the development of AT&T, one of the largest communications operators in the United States, and the transformation of information technology in the United States.
Mainly describe the relationship between knowledge from Chapter 10 and AT&T. For example, explain how cellular phone (from Chapter 10) develops (from the first generation of 1G to the fifth generation of 5G) and the impact of this change on AT&T's business.
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