How To Downgrade the Fat PS3 from 4.66 to 3.55 Firmware Using E3 Flasher Tutorial | Welcome to the Underground.
Sony PlayStation 3 PS3 Slim 160GB Console PS3 3.55 (CECH-2503A PS3 Firmware 3.55 | eBay
SANY ilaya - UPDATE!!! PS3 4.50 OFW DOWNGRADE (hardware flasher method)/UNBRICK SERVICE for BRICKED PS3 due to FAILED firmware updates (see guide below) JAILBREAK: -Software: for firmwares 3.55 below (slim and phat) -
How to Jailbreak PS3 - Video Tutorial 2014 - 3.55 OFW to 4.70 CFW [HD] - YouTube
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Sony PlayStation 3 60 GB Black Console CECHC03 Firmware 3.55 (FW 3.55) PS3 SACD | eBay