Deal live now, expires Jun 10.
The Verizon deal will be offered in conjunction with discount retailer Target (or Tar-jay to the entitled). Starting on June 4th (which is this coming Sunday) and running through June 10th, T-Mobile subscribers who port their number over to Verizon will be given a $300 discount on the Apple iPhone 7 and Apple iPhone 7 Plus when the purchase is made at Target. Those taking advantage of the deal will have to install the discounter's Cartwheel app, and download a special coupon from it that applies to the transaction.
See attached images for more details.