Their marketing is pretty clear for the plans that have soft data limits but they hide their throttling for the "unlimited" plan in the fine print. http://www.

Their marketing is pretty clear for the plans that have soft data limits but they hide their throttling for the "unlimited" plan in the fine print. http://www.t-mobile.com/cell-phone-plans/individual.html http://www.t-mobile.com/cell-phone-plans/individual.html > "*Unlimited 4G LTE customers who use more than 21 GB of data in a bill cycle will have their data usage de-prioritized compared to other customers for that bill cycle at locations and times when competing network demands occur, resulting in relatively slower speeds. See t-mobile.com/OpenInternet for details."