In a move that managed to raise many eyebrows, T-Mobile has thrown in an industry-challenging data rollover plan for its 4G LTE users. The initiative - Uncarrier 8.0 - is T-Mobile's attempt at shaking up the industry, and with the new 'Data Stash' feature which basically allows users to carry over unused data over to the next month's bucket, it looks well poised at doing so.