Itís official: T-Mobile has gotten under AT&Tís skin. AT&T announced on Friday that it will offer T-Mobile customers up to $450 per line when they switch to T-Mobile, a stunning preemptive strike thatís being done in response to a rumor that T-Mobile plans to pay off subscribersí early termination fees when they switch from another carrier. The $450 payout will include the standard $250 that switchers can receive when they trade in their old device as well as an additional $200 payout specifically aimed at T-Mobile subscribers. The companyís full press release follows below. AT&T Offers T-Mobile Customers Up To $450 Per Line To Switch DALLAS,-Jan. 3, 2014-/PRNewswire/ Ė-Starting today,-AT&T* is offering T-Mobile customers the opportunity to upgrade their mobile



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