Firmware List:
| # | Model | Version | Region | OS | Size | |
|---|---|---|---|---|---|---|
| 1 | SM-T866N | T866NKOU4DVH2 | KOO | S(Android 12) | 5.18 GB | Download |
| 2 | SM-T866N | T866NKOU4DVG5 | KOO | S(Android 12) | 5.14 GB | Download |
| 3 | SM-T866N | T866NKOU4DVD1 | KOO | S(Android 12) | 5.18 GB | Download |
| 4 | SM-T866N | T866NKOU4CUK1 | KOO | R(Android 11) | 4.83 GB | Download |
| 5 | SM-T866N | T866NKOU4CUI5 | KOO | R(Android 11) | 4.82 GB | Download |
| 6 | SM-T866N | T866NKOS3CUG1 | KOO | R(Android 11) | 4.81 GB | Download |
| 7 | SM-T866N | T866NKOU2BTF1 | KOO | Q(Android 10) | 4.36 GB | Download |
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