The vocal output may be muted due to minute dust particles. Even while disassembling an iPhone would greatly aid in cleaning off the grime inside the smartphone, doing so is difficult and not advised for those without knowledge. Instead, purchase something to clean the dust, like a toothbrush or an air compressor. Consider the airflow intensity if you opt to utilize an air compressor. Too much can harm the iPhone's internal hardware. Additionally, avoid inserting pointed things like toothpicks into the iPhone's microphone as doing so may harm the gadget.