What wasn't clear to me here (because I didn't put Step 13 together with Step 12, I suppose?) is that if your replacement part came with speaker grills and camera gasket, Step 12 is your final step. You are done, except for replacing the cables and covers, then placing the adhesive strips onto the replacement part and sticking the phone back together.
I ordered my screen from iFixit and it came with new grills and camera gasket already installed. I was able to use the thinnest strips on the supplied Tesa patch to line the entire screen perimeter piecemeal, then stick it back together like new.
I decided to work outdoors, didn't read any comments first, so when mine flew off I found it five cursing minutes later in a crack on the driveway. Should have read the comments first! Thanks hamiltont. Will now read every comment BEFORE attempting step.
I think this guide belongs on the “itakeitapart.com” site instead of here. There is a good video on how to fix the toggle switch problem of no light turning on on youtube. (Hint: it has nothing to do with replacing the toggle switch, and you don’t need to buy any new parts.) I’ll certainly try the video’s fix before I invest in any new parts. I don’t know if fixit will let me link the address, but here it is: https://www.youtube.com/watch?v=HypmCh_s...