If your experiencing problems with the speaker on the Nokia n91, then try the recommended solutions below. This is so you can fix the not working speaker problem yourself:
1)Hard reset the Nokia n91.
2)Update the firmware to the latest firmware version. To update the phone's firmware, you will need a download Nokia Software Update, have a compatible usb cable and of course have access to a computer or laptop, with a fast Internet connection. Updating is free and is not a complex procedure to carry out, check my other blog post because i explain the complete process on how to update the firmware on any Nokia mobile phone.
3)If updating didn't solve the speaker issue, then you have to dissemble your Nokia n91, and replace the speaker, the speaker that is stopped working. Before replacing the speaker, remove it from the device and test it, using a small powered Hi-Fi. This testing method i recommend to you, will help you identify if the speaker is damaged or blown and then you can be 100% sure if you need a replacement speaker.
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