Chosen Solution

Customer says Siri isn’t working after I fixed his phone. Wondering if the damaged to the front camera assembly is my fault or his Update. So Touch ID is working, loudspeaker working, even while on call. Basically everything is working, except Siri won’t respond to voice commands. He said he tried all the software things that he could think of, but still, Siri can’t hear him

Replace front camera flex, should work fine then as you may have damaged the microphone. :)