google "update-1-how-to-install-cfw-4-21-on-non-3-55-downgradable-ps3-with-flasher"
A member of logic sunrise One PS3 3K Model upgrade on CFW 4.21 with success. Apparently its varies greatly from one PS3 to another
Result : 3 SUCCESS(1 FAT, 1 3k Model and 1 slim with 3.56 minimum firmware for 1 brick (ps3 data code 1c, fw min 3.66, metldr 2) + 2 Brick
http://www.logic-sunrise.com/news-55...-possible.html
A member of logic sunrise One PS3 3K Model upgrade on CFW 4.21 with success. Apparently its varies greatly from one PS3 to another
Result : 3 SUCCESS(1 FAT, 1 3k Model and 1 slim with 3.56 minimum firmware for 1 brick (ps3 data code 1c, fw min 3.66, metldr 2) + 2 Brick
http://www.logic-sunrise.com/news-55...-possible.html