Yes I flashed all 5 files and left the sprint SIM in there. The boot loader didn’t change to the sprint logo either like it did on the S8. Maybe the files from the samfirm app are not for sprint I don’t know but for region I put in SPR just like I did with the S8 or maybe I got them from uodato I can’t remember honestly[COLOR="Silver"]
I think the problem are these files are wrong/not the full conversion.
The one the OP found seems to be just the normal U1 firmwares with the data part different only, thus your boot logo etc. would not change because it's the same one and not actually the sprint one.
We actually would need this one:
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