Ever since smartphones began demanding more data, smartphone providers had no choice but to implement a soft data cap or deprioritize heavy data users in favor of those who use less data. Currently, T-Mobile throttles customers who use more than 32GB of data within one billing cycle. Other carriers are in the general ballpark area of 25GB to 30GB for a soft-cap. According to a leaked internal document obtained by Android Central T-Mobile will begin implementing a new soft-data cap of 50GB per billing cycle. T-Mobile calls this its "Fair Usage Threshold". The new data soft-cap is to...
Source: http://www.gsmarena.com/tmobile_will_raise_its_monthly_softcap_to_50gb-news-27338.php
