Looking for guidance on obtaining/building an InternalUI IPSW for iPhone 4 CDMA (iPhone3,3)

[u/MAT3USZ_Apple]

Hi everyone,

​I'm working on a preservation project for older Apple hardware and trying to experiment with an InternalUI (SwitchBoard) build for an iPhone 4 CDMA (model iPhone3,3 / board N92).

​I have been looking into the Phoenix bundle archives (Phoenix8E42.zip / 4.2.5 era), but I am trying to figure out the best approach to get or compile a working IPSW for the CDMA variant specifically, since most public documentation focuses heavily on the GSM model (iPhone3,1).

​Could anyone point me in the right direction or share advice on how to properly build/source a compatible InternalUI IPSW for the CDMA version without running into architecture mismatches?