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  1. Downgrade PSP 3000 OFW 5.50
  2. Downgrading Custom Firmware (OE / M33)
  3. 3.50 Downgrade Guide
  4. 3.03 Downgrade Guide
  5. 2.71 Downgrade Guide
  6. 6.20 TN-B : How to DOWNGRADE ANY PSP WITHOUT PANDORA