This is weird. I got one of those replacement kits to replace the screen on my wife's iphone 5s (model number a1457). The phone is water damaged. When I took the screen off, the phone was way different from just about every video I have seen on youtube, namely because:-
1) There was no ribbon cable attaching the home button to the screen. I dont see how I could have broken it and there would be no trace of it. The home button is simply sitting there on the mainboard.
2) There are no steel rails running along the sides. I can't see how I could have broken these off, I mean there's no fragments or anything.
I bought the phone off Kogan. Ive never known them to sell fake stuff before. Am I missing something here? Ive attached photos, below:-
I can't answer your question but as someone who has repaired a fair few of these units I've never seen one open up like that before!