Originally Posted by DEFAULTDNB
Stick to 3.55 CFW for now. 4.21 CFW is unstable.
Never update to a higher OFW than 3.55, if that's what you mean? Definitely DO NOT update to 4.21 OFW thinking you can then install 4.21 CFW.
3.55 CFW is the way to install newer CFW in future, for now.
But why is 3.55 still the only way with all of these new keys that the scene is discovering?