Sprint, in a move that shows its increasing concern about the competition, has announced that it will give any T-Mobile customer a minimum of $200 towards a new device when they trade in a working device and port over their number.

This offer will be available until April 9th, and customers can combine it with Sprint's existing contract buyout deal, where T-Mobile customers get $350 per line in the form of a Visa prepaid card to cover their first bill or early termination fees.

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