How can I fix my phone speaker if the sound is too low or muffled?

When your phone sounds like it is covered with dust or is too quiet, then the first thing is to check the phone to see whether there is dust or a piece of debris covering the speaker grill, which is among the most common reasons. Sound can be improved immediately by gently cleaning it using a soft brush or compressed air. One more thing is that you should also check volume settings, turn off Bluetooth, and restart your device to eliminate software problems, and then if the problem persists, it means that it's time to fix the phone speaker.