"How do I fix speaker volume issue on iPhone 13 Pro?: Hi, My iPhone 13 Pro speaker volume is too low. It's difficult to hear music or a phone call on speaker. What could be the reason, and how to fix it? I have cleaned the speaker grill with a toothbrush, but no improvement."

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There could be bugs in the iOS. So, update your iPhone to the latest iOS release (iOS 18.5). Are you using any beta iOS versions? If so, uninstall it.

Power off your iPhone, and then perform this through a computer...