Two rumors do not make a USB dongle, but things certainly seem to add up -- one leaked document told us T-Mobile would get its first 21Mbps HSPA+ WWAN modem in March, and now a second one (once again courtesy of TmoNews) pegs the T-Mobile Jet's "value-conscious" successor for the 23rd of this month. Of course, if that first document was correct, there are faster 42Mbps modems just around the corner. Your call.