New line of service required. T-Mobile is offering up to $950 off the new iPhone 12 Pro Max or iPhone 12 Pro, up to $830 off the iPhone 12 and up to $730 off the iPhone 12 mini with qualifying device trade-in. Trade-in discount is applied via monthly bill credits.

iPhone trade-ins eligible for the maximum $950 are: iPhone 11 Pro Max and iPhone XS Max. The next tier nets you an $830 discount: iPhone 11 Pro, iPhone 11, iPhone X, iPhone XS, iPhone XR, iPhone 8, iPhone 8 Plus.

Other promotions include: Buy one, get one free on the iPhone 11 (via 24 monthly bill credits).

Other carrier offers:

Apple Store has Up to $250 off new iPhone w/ Trade-in

AT&T has Up to $700 off new iPhone w/ Trade-in (new line or upgrade)

T-Mobile/Sprint has Additional $150 Trade-in Credit with iPhone Purchase at Apple Store

Verizon has BOGO Free iPhone 12 (new line)

Best Buy also has trade-in offers from AT&T, Verizon and Sprint.