Not happy with firmware 6.38? Want to use 6.20 TN? Now you can! Pop the 6.20 EBOOT.PBP in ms0/ef0:/PSP/GAME/UPDATE, download this downgrader and execute.
This is a port of Davee’s 6.35/6.31 Downgrader, released by some1. It is signed so everything’s gravy, baby. The source code is said to be released come May 29th.
Technical detailsIt uses the utility/power exploit to gain kernel access and reboots into the updater with a special PRX running. This PRX uses the pspdecrypt functionality to decrypt the updater PRX when needed. This allows the updater to boot in the newer firmwares.
This downgrade has been tested on PSP-1000, 2000, 3000, and go models; 07g and 09g are not currently supported. That may change in the near future. Not sure what model you have? TryPSPident.
Update: some1 just added 07g/09g support.
So if you have one of those (07g or 09g) you need to place the 6.35 update in PSP/GAME/UPDATE, which I guess implies you’re downgrading to 6.35 and cannot go any lower.
Use the 6.20 update if you’re sporting hardware older than 07g. And you can still downgrade from 6.31 or 6.35, just like Davee’s.
Update: some1 has released v3, adding support for firmware 6.39.
Update: And a quick bug fix for 6.38. Try 6.3X Downgrader v3.1.
Use at your own risk. We are not responsible if you brick your PSP - Download
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