There have been many reports that the iPhone 7 will be added to the stereo dual-speaker design. The most direct evidence is that a series of openings are symmetrically distributed on the left and right sides of the machine. 
But the latest exposure of a group of suspected iPhone 7 engineering drawings shows that the two sets of openings at the bottom of the phone, only one set corresponds to the speaker, and the other side is a hole made purely for decorative effects, which has no practical effect.
These drawings divide the iPhone 7 body into a number of different parts, and introduce the corresponding design and function, respectively. The bottom two sets of openings are marked as B4 microphone net film, B8 speaker net film, not all speakers. 
In fact, a group of iPhone 7 drawings that were exposed before also showed that only one group of the two groups of openings was completely open, and the other group did not. 
I am not willing to provide stereo speakers until now. Why is Apple so stingy? 
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