IPhone 12 Pro Max Trade-in Alert: Carrier Promos and Upgrade Milestones
The aggressive numbers promoted by network carriers come with distinct contractual obligations. Carriers do not write checks for $1,200. Instead, the subsidy is paid out through monthly bill credits stretched over two to three full years.
On AT&T, a $1,200 credit against a new flagship is distributed across 36 billing statements at approximately $33.33 per month. If you cancel service, switch networks, or downgrade your unlimited plan to an ineligible tier during month 20, the remaining 16 months of bill credits immediately vanish. At that point, the uncredited balance of the new device becomes due in full on the next invoice.
T-Mobile uses a similar system across a shorter 24-month horizon, but requires enrollment in premium plans like Go5G Next or Go5G Plus. These tiers can run $15 to $30 more per line each month than standard legacy plans. Over two years, that monthly plan surcharge offsets a considerable portion of the promotional trade-in gain. For single-line accounts, moving from a low-cost legacy rate to a top-tier network tier solely to capture hardware credits can turn a paper profit into a net monthly loss.