I managed to successfully downgrade my EU n3ds from 10.3 to 9.2.0-20E using a zip file with the MD5 hash "6DCCA8FCBC9A28C82C2A4E5182F3ACF8".
The device came with 9.9 firmware from the factory.
Device specs:
- Model: KTR-001
- S/N: YEM1040****
- Color: White
Device state while attempting to...