T-Mobile has opened pre-registrations for new and existing customers to get the upcoming Apple iPhone 7 32GB Smartphone for free with the trade-in of an iPhone 6 or newer. (Trade-ins will begin on Friday September 9 at 3:01 am ET; you'll receive an email reminder.) That's the first offer we've seen for the iPhone 7, which was revealed yesterday. These new smartphones are water- and dust-resistant and feature a new A10 Fusion quad-core processor, "Taptic" force-sensitive home button, and 7-megapixel FaceTime HD camera. Click here for full details of the phone's features.

Of note, T-Mobile will also offer the Apple iPhone 7 Plus 32GB Smartphone for $120 via the same process.

Update: The trade-in offer now requires T-Mobile customers to sign up for the T-Mobile One service.