Don't forget to clip this in flush, my phone couldn't get a cell signal when it was slightly out-of-place.
The bracket in step 10 is very important. I tried reassembling the phone with the bracket slightly out of its seat, but screwed in, and the phone was stuck searching for a cellular connection. I opened it up and checked the cellular antenna connection, and it was good and tight, but the bracket wasn't. After fully clipping that in and reassembling, the phone began to work completely.