AT&T is increasing prices for its "retired" unlimited wireless plans, which customers who have not upgraded are still using, by as much as $20 starting next month. The changes will affect accounts with a single line, or two or more lines, and the price increase is capped at $20 per account. The company maintains that its new plans are priced competitively with other carriers' plans and are aligned with how customers use their services. The increase only applies to wireless plans activated prior to July 2025, not just discontinued plans.