No audio recording, voice memo recording button unavailable.

This is a well known signature problem for the iPhone 7 and 7 plus. It is a board level fault—flexion based damage at the C12 pad for the master clock signal of the audio ic chip. It happens from normal use of the phone and is due to poor design and construction of the logic board, combined with Apple ignoring this class of defects which first occurred en masse with the iPhone 6 plus.

I got tired of typing out the same post again and again so I wrote a blog article about it recently. You can read it here: http://www.ipadrehab.com/article.cfm?Art...