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From HABIB via Tortuga-Cove:

Seeing so many bricks I finally decided to release OUR NEW CFW 4.55
currently there is no cobra features, Just a Simple CFW.

ZER0 4.55 v1.00 [CEX]
FEB/10/2014

FEATURES:

1. MADE OUT OF 4.55 OFW
2. HAVE INSTALL PACKAGE FILES AND APP_HOME
3. HAVE REACTPSN COMPATIBILITY
4. PATCHED LV0 TO DISABLE COREOS ECDSA CHECK
5. PATCHED LV2 TO ADD PEEK/POKE SUPOORT
6. PATCHED LV1 TO DISABLE LV2 PROTECTION
7. PATCHED LV1 TO ADD PEEK/ POKE SUPPORT
8. IT CAN RUN GAMES SIGNED WITH KEYS UPTO 4.55
9. CAN BE UPDATED OVER ANY CFW.
10. CAN BE UPDATED OVER 3.55 OFW
11. ADDED NO BT/BD PATCHES
12. RSOD BYPASS
13. REACTPSN OFFLINE PATCH ADDED
14. BETTER SYSTEM STABILITY
15. PSP REMASTER SUPPORT ADDED
16. QA FLAG ENABLED BY DEFAULT IF PS3 WAS QA ON 3.55

NOTE:
I'm really sorry about the late release.even this release wasnt planned but just because of people bricking consoles i released this.we are currently working hard on porting COBRA over to 4.55

DB OFW:
It's ready just make me mirrors of this cfw then ill upload db ofw...

COBRA:
Our much waited talented dev Abkarino is busy now but hopefully we will focus more on it once he is free....

My friend aramis is also on work, he is also one of the greatest devs out there.(just unknown hidden guy)

SIGNATURE:
in lv0.elf offset 10108
Download: You must login or register to view this content.
MD-5: 087C98A27FFF4FEDDB89183AB7BDD016

Source: Tortuga Cove

Is this legit? Also is it safe to install over 4.46.1 rebug rex?

Yes it's legit and you can install over any CEX CFW, and you upgrade from 3.55 OFW.

Ok thx but ill wait until someone can else says its safe

Do I need a e3 flasher?

Y dont try and make 4.55 cfw for to install over ofw

rogero4.50 v1.00(no back OFW 3.55) → habib 4.55 zero v1.00 possible?
and habib 4.55, CCAPI work..?

Thanks.

Ccapi will highly likely not work since its not updated for 4.55

i can downgrade for you

How? My ps3 is slim CECH-2505b