Tier 15 (operator mask unlock)
80010004 35CC42F8
88010004 0006000B
28000004 05F5E0FF
8001000D F37629DC
00000000 00000600
0B000000 00000000
2800000D 00000023
After logging in, choose the save file you are using. It will say that you are tier 16. Select that save, wait for it to load, then navigate to Tier One mode and activate your level up.
You should, then, be able to unlock the operator mask.