Update destroyed my volume as well. I can hardly hear with the phone pressed to my ear. Also my phone has the worst problem receiving calls. After the One UI update, phone calls are no longer received unless I have my phone connected to wifi and voice over wifi enabled(wifi calling). I did not move, did not change service. Seems like the ONE UI nerfed these phones in volumes, antenna's reception, and battery life. I have since factory reset the device but still not fixed. But it also brought up another problem, now my Samsung Pay is broke after factory reset. If Samsung is nerfing phones so that users can upgrade, trust me I am jumping ship from Samsung.
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