iPhone 4 issues no sound after update iOs 7.0.3

Hello yudieallen

Start your troubleshooting with the article below to resolve issues with not hearing anything from the speaker on your iPhone.

iPhone: No sound or distorted sound from speaker

http://support.apple.com/kb/ts5180

Try these basic troubleshooting steps first

1. Verify that the volume is set to a level you would normally be able to hear.
2. Ensure that there is nothing plugged in to the headset jack or the dock connector.
3. If the iPhone is in a protective case, make sure that the speaker port isn't blocked by the case.
4. Make sure that the speaker and dock port aren't clogged with debris. If necessary, clean it with a clean, small, dry, soft-bristled brush. Carefully and gently brush away any debris.
5. If an audio issue occurs when using a specific application, try testing other applications to see if the issue persists.
6. If the iPhone is paired with a Bluetooth headset or car kit:

Try turning off Bluetooth.

If you experience difficulties with the Bluetooth feature, follow these troubleshooting steps.

1. Restart the iPhone.
2. If restarting doesn't fix the issue, ensure that your iPhone is updated to the latest version of iOS.
3. If the issue is not resolved after restoring the iPhone software, please contact Apple Support.

Regards,

-Norm G.