I get the same sound as his 7 plus on my 7 (ATT). As I mentioned in my prev post, the household 6 and 6S also have noise but not as loud by far.
Tried recording video in as silent a room i can get with all three models (6, 6S, 7) and a 9.7 inch ipad pro for 30 seconds. My results were the following (no, Im not going to go through the hassle of posting to youtube, Im sure many of you have multiple generations in the household and can do the same test yourself).
7: audible constant regular sound, whine heard
6s: audible clicking sound, much faster in beat almost to point its constant, no whine heard
6: no clicking no whining
Ipad pro: no clicking no whining
To reiterate, all models above except ipad exhibit some clicking/whine when holding your ear to the back; none of them are loud enough to notice in real world usage.
FWIW even though its audible in a 7 recording, its definitely not loud enough to be noticeable in day to day recording. Still not sure whether im going to bother to return