As you’d expect, T-Mobile was fully prepared for Apple’s iPhone event today. Shortly after the keynote address concluded, the wireless carrier announced a new trade-in promotion on the latest devices from Apple. That includes a guaranteed $300 trade-in credit for any iPhone 6 or newer that is in “good working condition”. T-Mobile’s latest promotion is available for customers that purchase an iPhone 8/Plus/X on an equipment installment plan. Regardless, for those looking at Apple’s latest devices, which top out at $1,150, this offer might help with forking over the extra cash.