SamyGO

Hy,

I think I take Mistake..
My Firmware is |now| T-MST4DEUCB-1014
I would like to install firmware T-MST5DEUC-1025

Have someone the T-MST5DEUC-1025 with validation upgrade to 1013?
Or can I self build the validation upgrade with some wiki articel?

Or must my D5500RH for the downgrade rooted?

Skip this idea, because this is straight forward to the brick. Use TV "as is", you don`t get any improvemnts nor new features/functions. Don`t waste your time, your tv model is not suppurted by SamyGO. If you really want something "new", attach any mediaplayer/google TV and use their features.