PS4 News - UPDATE on Downgrading systems, someone has successfully done it - YouTube
PS4 Firmware Update 6.72 Is Available to Download Now | PS4 Update 6.72 Patch Notes Detailed - YouTube
EP 1) Full PS4 Jailbreak Tutorial (6.72 or Lower!) - YouTube
PS4 Firmware Update 6.72 Now Available to Download | Push Square
Just bought my first PS4 for $80 and the console looks brand new, with FW 6.72 ! Anything I need to know about getting into and maintaining the PS4? : r/PS4
PS4 Firmware Checker for Latest System and Recovery FW by Pearlxcore | PSXHAX - PSXHACKS
Gamers Can Download PS4 Update 6.72 Now
SONY PlayStation 4 PS4 500 GB Jet Black Console Firmware 6.72 | eBay