Originally Posted by danyboy666
Any safe way to update a CECH25 console on rebug 3.55.2? Read lots of peoples having blackscreens at reboot.
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Well, did you go from 3.55 OFW first then you are able to go to 4.21 CFW. If not then you should installed 3.55 ofw first before go to 4.21 cfw. Installing rebug 3.55.2 to 4.21 cfw is not a good idea.