T-Mobile cuts $300 off the Apple iPhone 8 or iPhone 8 Plus (iPhone 8 Plus in Space Gray pictured) via 24 months of bill credits when you finance it and trade in a qualifying used iPhone. Plus, free shipping applies. These phones have a glass front and back, with an overall steel-reinforced design. They have a 4.7" and 5.5" Retina HD display, respectively, as well as a new A11 Bionic 6-core CPU. Also included is a 12-megapixel rear camera with optical image stabilization on both models (dual camera on the Plus model), Bluetooth 5.0, wireless charging, and water and dust resistance. It's available in 64GB and 256GB options. Some exclusions may apply. Deal ends October 12.