Be Very Careful With The Installation
The innards of an iPhone are highly complex, and a repair person needs certain knowledge, skills, and experience to do the job right. The slightest mistake or oversight can worsen the damage and make the problem more complicated, so here we strongly recommend our customers to search related instructions or tutorials on Google or YouTube. Here I found some instructions on iFixit.com and YouTube, it is helpful to take a look, please try it out.
Home button or camera replacement instructions can be found in the screen replacement instructions, as it is part of screen replacement instructions.