Starting April 5th, T-Mobile will begin capping the Domestic Roaming Data Allotment. Unlike their data throttling, once a user goes over their designated allotment,they will simply be cut off from data altogether, until they return to the T-Mobile network or connect via WiFi. While this change is unlikely to affect the majority of us (when’s the last time you used data while roaming?), T-Mobile will send out warnings via text message when your domestic roaming data allotment has reached both 80% and 100%.