T-Mobile has begun sending notices to customers informing them that a number of legacy rate plans are being retired, with subscribers to be moved onto current offerings from the carrier's active lineup.

The affected plans include options inherited from Sprint following T-Mobile's 2020 acquisition of that carrier, as well as plans that predate widespread 4G LTE deployment — meaning some customers have held the same rate for the better part of fifteen years.

T-Mobile has not released a full inventory of which plans are being discontinued, nor has it published a side-by-side comparison of legacy rates against the replacement plans customers will be assigned.

The notifications do not offer subscribers the option to opt out. Customers who want to keep a different plan than the one T-Mobile selects for them would need to actively choose an alternative before the transition date listed in their individual notice.

T-Mobile's press materials have described the Un-carrier as a company that “listens to customers.” The grandfathered Sprint rate plan has no comment.