Anyone having issues with the antenna, you can also try plugging the antenna before putting the speaker back. It was easier for me to do it like that. It took me 1hr 30min first time but everything works perfectly. There are two pieces (one of them is the antenna bracket) that the item doesn't bring so make sure to remove it from the original.
I did, it ended up being the display that came damaged. I already returned it and ordered a new one from ifixit, just waiting for it to get in the mail.