It used to be that Verizon and AT&T could happily divvy up new subscribers every quarter while perpetual losers T-Mobile and Sprint would see their subscriber numbers shrink. Slowly but sure, however, T-Mobile’s “Uncarrier” campaign has helped reignite its growth and has made things significantly less comfortable for America’s two largest wireless carriers.

Consumer Intelligence Research Partners has come out with a new report showing that T-Mobile’s share of new subscribers grew faster than any other carrier over the first quarter of 2014. T-Mobile still only had the third-highest overall share of new subscribers at 15%, but this still marked an increase of two percentage points from the previous quarter when it snagged 13% of new subscribers. In contrast, Verizon’s share of new subscribers stayed flat at 35% while AT&T’s share shrunk slightly from 29% to 28% on the quarter. Sprint also saw its share of new subscribers tick upward on the quarter, going from 8% at the start of the quarter to 9% at the end of the quarter.

CIRP cofounder Mike Levin says the reason that the two smaller carriers showed the most growth on the quarter is simple: “Both T-Mobile and Sprint have led the market with novel and disruptive offerings, and consequently seem to attract new customers.”

Prior to joining BGR as News Editor, Brad Reed spent five years covering the wireless industry for Network World. His first smartphone was a BlackBerry but he has since become a loyal Android user.