You can also downgrade your PSP Firmware with the following limits: PSP Slim (2000) to Firmware 3.60, PSP 3000 to Firmware 4.20 and PSP GO’s to Firmware 5.70. (Instructions on how to do this are below) However this is VERY RISKY and you could brick your PSP. We at PSP Slim Hacks don’t see the point in downgrading, as 6.20 TN-B pretty much does all chickHEN R2 would do. And why risk and unrecoverable brick?
Again: We don’t recommend downgrading your PSP. Its not worth the risk. PSH aren’t responsible if you brick your PSP!
(Changelog 6.20 TN-B)
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- Fixed homebrew execution crash on some PSPs (thanks to HacKmaN for debugging)
- Added 4g model support
- Resolved some important NIDs
- Added FAKE INDEX.DAT to TN VSH Menu.
- Dump whatever FW with psardumper.
- Copy /F0/vsh/etc/version.txt to /seplugins/version.txt.
- Enable the option and restart VSH, now your PSP version is faked.
-> To downgrade just dump a lower FW.
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