{固定描述} In a rare display of coordination, the three largest U.S. wireless carriers—AT&T, T-Mobile, and Verizon—are rolling out a major network infrastructure upgrade. The move comes as intensifying competition from regional players, cable operators, and new entrants pressures the industry leaders to improve coverage and capacity.
AT&T, T-Mobile, and Verizon Join Forces in Unprecedented Network Overhaul - Guidance Downgrade Alert
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