Hello, everyone including big brother Apple. I’ve made several posts to this thread and have an update for my phone.
My iPhone 7 Plus was purchased directly from an Apple Store on 12/24/16 and has always been in an Otterbox defender case from day one. My phone early this year was experiencing low call volume and was hard to hear people and for them to hear me. When I updated to IOS 13.4 the microphones all stopped working completely. I could now not hear anything during a call and the speakerphone would not work. Also, voice memos were dead, the video recorder stopped working, the WiFi icon would be greyed out for awhile after a restart. Watching videos from Safari also went black with only audio. I restored twice and briefly I got a call the first time and then everything went back to not working. A few weeks ago Safari videos started playing again without the black screen, no idea what I did if anything.
If you have the microphone issues like I had this is an audio IC chip problem. Our phones have a design flaw that enables a slight flexing to occur with the case, which stresses a logic board inside that has the audio IC chip on it. Over time this chip becomes disconnected and your microphones stop working with the WiFi issues and eventually your phone will get stuck booting up (loop disease).
A few days ago I took my phone to a repair shop and had them fix the audio IC. My microphones work now, but it cost me $139 and tax for the fix. Finding someone local in Washington state was also a problem as micro soldering is required. After the repair strangely I lost Safari videos again to the black screen. The technician has done hundreds of these audio IC repairs and noted that this problem was a new one not in relation. We tried everything and eventually a restore fixed the video problem. The technician researched this and he believes it is an IOS 13.4 flaw, which I agree with. IOS 13.4 seemed to cause my phones audio IC problem to get worse and then the Safari video playback issue. IOS 13.41 fixed nothing for me. If your phone has the microphone issues surgery to the audio IC may be the only real fix. An update could possibly change the way the flawed audio IC works restoring some functions. A Bluetooth device such as AirPods or a third party equivalent could help you make and take calls. HC Browser works playing videos such as YouTube, but be cautioned Privacy and Security are probably at risk with this Chinese based web browser. Sorry for the long post, I hope it helps someone. Apple really dropped the ball on this and needs to address our phone’s design flaw and IOS malfunctions. Just terrible we have to go through this.