Today Sony PlayStation 3 hacker Mathieulh has posted a video demo showcasing the PS3 QA flag, which is the internal console flag used by Sony to enable hidden Firmware options and removes restrictions on Retail and Debug consoles.
This is done on official PS3 Retail/Debug firmware without any modification as the console itself is QA flagged (QA token is set through spu_token_processor), meaning the method will not work on unflagged consoles and using the advanced QA flag also enables PS3 Firmware downgrading.
From the video's caption: I just QA flagged my Metal Gear Solid 4 Limited Edition console and I thought I'd show you the hidden options for the sake of it (and because I was bored).
I am sorry for the unstable camera, I only have two hands and the options are hidden and require (along with the actual flag) a crazy button combo to pop up. (I kid you not)
Sorry I am not telling you how to do this, please do not ask. Yes, this video is real.
QA flag is the internal console flag used by Sony, it enables hidden options and removes restrictions for both retail and debug consoles alike. It is used for QA centers and the R&D Department, there are 2 levels of QA flags, Minimum and Advanced, this console has been set to the Advanced one.