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I’m completely new to doing iPhone maintnents myself so this is a really outlandish creative question, but hypothetically could you install an iPhone X esc screen on an older 6? Ive seen people jailbreak the 6 and install other features found on new iPhones such as tap to wake, and even an aftermarket Face ID. Ive also seen conversion kits to make your 6 look like an X from the back, but has anybody herd of a display conversion kit?

This just isn’t possible. The differences in the display is too much, for example the power required to light up the screen would most likely be too much and would overload the backlight circuit on the phone.