Any Phone OS on iPhone! (Concept)?

<DISCLAIMER>
This is a concept! I don't know if it is possible to do this!
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My Concept:
1. Take the update file out of the iOS Device
2. Get an update file for another phone (In this concept, i'll use the Android)
3. Extract files from both the iOS and Android update file.
4. Replace all of the iOS Files with Android (BUT DON'T CHANGE THE SIGNING!)
5. Recompile the iOS Update file.
6. Use it (or distribute it)

This might work because it will change EVERYTHING on the iPhone, but since the signing remained the same, your system will register it as a legitimate iOS Version, so it will be allowed.

Please tell me if this will work!

Nope, will not work. Even though the signing retains (coining your term), the Android update files will be looking for underlying Android system to update. Best case: Nothing will happen since the update files does not understand the underlying iOS system. Worst case: might mess up your device. There are lots of things going on in there, just thinking how I'm gonna explain it to you gives me a headache. So that's the simple explanation.

I highly doubt that it would work as the android and Apple would have different hard ware and the OS would look for certain hardware and not find it. Then you would have a very expensive brick

Doesn't work like that, the hardware has hardcoded software built in so that it can read IOS, install Android onto it would mean it will try and read data it doesn't understand. It's like handing a foreign book to someone who doesn't speak that language and giving them no tools to even help translate it.

Ok then. I don't really care. It was just a random idea that popped to mind when i was bored as hell. Lel