Chosen Solution
Hey! So now after ive repaired 2 iPhone 6s they both had the same problem. Everything else went completely smooth but I then realised that the earpeice speaker doesnt work. I havent been able to put back the black strip that is attached to the bracket. I think that that might be a problem? I wonder what else I could do to be able to put that bracket-string into place. I could provide other info if needed Thanks!
I would go through this guide and double check that everything was done correctly. Also, you will want to clean the contacts with IPA to remove any skin oil residue.