AT&T is offering the Z Flip4 for free with trade-in of any Galaxy in any condition ($1000 value), a free storage upgrade (256GB) and a free case. : r/galaxyzflip
T-Mobile Powers the Ultimate 5G Experience for Samsung's Newest Devices, Galaxy Z Fold4 and Z Flip4 - T-Mobile Newsroom
SM-F721ULBAXAU | Galaxy Z Flip4 128GB (T-Mobile) Blue | Samsung Business US
SM-F721UZDAXAU | Galaxy Z Flip4 128GB (T-Mobile) Pink Gold | Samsung Business US
SM-F711ULVBXAU | Galaxy Z Flip3 5G 128GB (T-Mobile) Lavender | Samsung Business US