T-Mobile iPhone 15 Special Deal: Monthly price reflects net monthly payment, after application of T-Mobile trade-in credit applied over 24 months with purchase of an iPhone 15 Pro, iPhone 15 Pro Max, iPhone 15, or iPhone 15 Plus and trade-in of eligible smartphone. Receive credit with purchase of an iPhone 15, iPhone 15 Plus, iPhone 15 Pro, or iPhone 15 Pro Max of $1000, $800 or $400) for customers on a Go5G Plus plan (based upon the model and condition of your trade-in smartphone); or $350 or $175 for customers on a Go5G, TMO