Iphone7+ can't hear caller and caller can't hear me

Same here. It is a known issue that affects some iPhone 7 models. While Apple didn’t offer an official explanation, I’ve spoken to Apple employees who told me that the software update appears to cause a hardware malfunction that greys out the speaker button. For two months, Apple was overriding the service fee to fix this issue that is caused by updating the iOS. They inexplicably stopped covering it and will now deny that the issue exists and deny that they ever paid for it. Extremely frustrating. My kids were trying to call me from camp, and I couldn’t answer the call or call back, for example... you can see why this is a very bad but to have. if you have this issue, contact Apple and let them know. They can’t continue to deny their customers. It’s consumer fraud.

I suggest that you keep contacting them or try to email them directly to see if that can be resolved, also I suggest you go to an Apple Store and show it to them.

I had an issue with Apple Support which went round in circles for 3 -4 months and finally they (Higher Authorities) rectified my issue and I got a full report too.

I have contacted Apple Support many times, as have many others affected by this known issue with certain iPhone 7+ models after the iOS 11 update. Apple support ran me around in circles and ultimately denied the issue, denied they ever covered it, and then simply disconnected my chat without resolving the issue.

Good to know. I am continuing to contact them but now they are disconnecting me in chat. I asked for an email address, and continue to get the general Apple care email address, to which I have sent detailed accounts of all of this. I know other people are doing the same. Hopefully it will be addressed and rectified sooner rather than later... frankly it is dangerous for me to not have a working phone.

Hello

From the information that you have provided are you able to hear by using the HandSet (iPhone Receiver) and Speaking through the iPhone Microphone ?

Thank you for that insight, And here is the link to contact Apple

Official Apple Support

I suggest you replicate the issue in front of Genius Bar representatives.