Credit: Joe Maring / Android AuthorityTL;DRIt seems a small number of T-Mobile customers with very old legacy plans are starting to see some forced plan changes.The plans impacted didn’t see changes or price increases last year, and actual price increases and changes vary.It appears these changes are targeting plans that existed long before Price Lock, such as certain Simple Choice plans.For years, T-Mobile and the other big carriers mostly left their legacy plans alone, letting customers switch when they were ready. This made sense back when new plans often brought real upgrades over legacy offerings, but over the past few years, most new plans have largely been seen as downgrades or sidegrades at best.Don’t want to miss the best from Android Authority?