T-Mobile Cuts Over 1,100 Legacy Billing Codes in July Automated Migration

T-Mobile begins automatically migrating customers from legacy plans to its 5G lineup on July 13, 2026, purging more than 1,100 legacy billing codes in the process. The scale signals the integration burden Sprint's 2020 acquisition created: fragmented rate structures, promotional overlays, and regional tiers that compound operational complexity over time. Enterprise mobility managers should audit plan stacks now; individual consumers on modern plans face minimal disruption.