According to the latest rumor, T-Mobile may be adding a fourth plan to its Mobile Broadband portfolio. Currently, the company offeres three data buckets to its wireless broadband customers: 10GB monthly plan for $84.99, 5GB monthly plan for $49.99, and a 200MB monthly plan for $29.99. Blog TmoNews is reporting, however, that the carrier will be adding a fourth, 2GB monthly option that retails for $39.99 to its repertoire this Thursday, April 28th. The carrier-specific site has a fairly good track record when it comes to T-Mobile pricing and plan changes — we won’t be surprised if this broadband-addition pans out. The four plan menu would give T-Mobile the widest selection of consumer, broadband data plans amongst the quartet of major U.S. wireless carriers.