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I know that the iphone 5 display is better to replace, but can’t i do the same to my iphone 4s?? And when i change the display on a iphone 4, do i the same to the iphone 4s? The last question is if i remove iphone 5s or 5c display do i do the same as whit my iphone 5? So it dosen’t work to remove iphone 4 display/screen like an iphone 5?? And in that case why????

Bellaalson, remember that all those phones are a bit different. I suggest you follow the guides, or take a look at the teardowns, for each individual phone so as to avoid any issues later on. iPhone 5 LCD and Digitizer Replacement iPhone 4 (GSM/AT&T) Screen Replacement iPhone 4S Screen Replacement iPhone 5c Teardown iPhone 5s Teardown You will see that each one is a bit different. Hope this helps, good luck.

plus one note , no matter how similar screens are on them, all connections on each model has different size connectors and pinout to logic board