T-Mobile Galaxy S8 S8plus SM-G955FD downgrade 8.0 to 7.0

[javvi]

Samsung Galaxy S8 Plus SM-G955FD loaded with 8.0.0 downgrade to 7.0 can i use XEU BTU version i will be using tmobile once downgrade is finished?

 

[Rukbat]

If you use a T-Mobile SIM, you'll be using T-Mobile service.

 

[javvi]

ok i know that but the firmware is it a good match for my model?