T-Mobile CEO John Legere shrugged off AT&T’s latest bid to win over his customers, saying their poaching bid amounts to a “bribe” that won’t fool anyone. Earlier on Friday, AT&T announced a limited-time offer giving T-Mobile customers up to $450 in credit if they switch over to AT&T.

AT&T on Friday announced a new initiative to try to steal business away from T-Mobile, but T-Mobile’s outspoken CEO was unfazed. In a series of messages posted on his Twitter account and retweeted from other Twitter accounts on Friday afternoon, chief T-Mobile executive John Legere fired shots directly at AT&T and its CEO for the carrier’s attempt to buy back the business Legere claims it lost to T-Mobile. “#Randall – you gave us cash & spectrum AND we took your customers with #Uncarrier moves, do you really think you can buy them back?” Legere wrote, speaking directly to AT&T CEO Randall Stephenson and referring to the breakup fee AT&T had to pay out following its failed attempt to acquire T-Mobile in 2011.