Audio issues (headphones/ear speaker) on iPhone 7 and iPhone 7 Plus.

This is a statement rather than a question.

The latest iOS update is causing problems with early builds of those phones.

Mine would act like the headphones were plugged in to the lightning port, even when not. My headphones would stop playing sound and the remote controls wouldn’t do anything. The phone volume buttons would say volume instead of headphones and the ear speaker wouldn’t do anything during a call. One last symptom was that when looking at one of your voicemails, the bottom left control for that particular VM said “Audio” instead of “Speaker”.

Apple just replaced mine under warranty.