T-Mobile is offering up to $1,100 off the new Galaxy Z Flip 8 when you trade in an eligible phone and activate on an Experience More or Experience Beyond plan, with savings applied as monthly bill credits over 24 months. Customers on most other plans can save up to $500 with trade-in, while select Simple Choice plans qualify for up to $250 off. As always, taxes, fees and a $35 device connection charge still apply.