Hi - I had something very similar happen today and got it resolved, so I found this thread and thought I'd add my experience to it. I have a OnePlus 6T McLaren Edition which has always worked perfectly on TMobile since I got it in January. This evening, I was trying to call a local business, and he kept saying "I'm sorry, but I can't understand you. You'll have to call us back." And then he'd hang up. It was odd, because I could understand him perfectly, and I had full signal strength and had turned off wi-fi so that I didn't have any potential issues with that as I sometimes do. After calling him the 2nd time and him hanging up again, I tried calling my own work cell phone, which is on AT&T. It rang and I answered it, and as I spoke, I understood what he was talking about. I sounded like a robot spitting out random crackling sounds. There was no way to understand a word I said. I immediately restarted my phone, and that had NO EFFECT on the issue. I wondered if something had
Chris, I don't know if you still monitor this thread, but this happened to me again today. I chatted with OnePlus support (I bought my device directly from them since it's a McLaren 6T) and they had no clue. They had me wipe the phone's cache by rebooting into a special mode. That didn't work. The only thing that works is clearing the STORAGE of the actual phone application. Not sure what could be causing this.
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