This is probably the simplest solution, but it may fix the issue. Use a toothpick or a needle to clean the receiver, and to remove the dirt. This step can make a huge difference.
Sometimes, you may turn the volume down not even noticing. Press the volume buttons located on the side of your phone.
In some cases, the problem was fixed with this easy to do solution. Go to Settings, choose Bluetooth, and turn it off.
To do this, press and hold the sleep/wake button. When the slider shows up, drag it to turn off your phone. When it’s off, press the same button to turn it back on.
Before you choose the option to erase settings and content, backup your files to iCloud first. Next:
- Navigate to Settings
- Click on General
- Click on Reset
- Choose Erase all Content and Settings
- Confirm the action
When it’s all done, set up your iPhone 5s as a new device by following provided steps. This step is useful in many situations.