Here are some steps to troubleshoot your phone speaker issues:

1. Check the volume settings of the speakerphone, making sure the audio switch is turned on.
   
2. Ensure the speakerphone is firmly connected in the correct ports.
   
3. Look for any visible obstructions in the audio path that might be blocking sound waves from reaching the speaker.
   
4. Make sure that other audio devices are disconnected. You should only have one audio source connected.
   
5. Adjust the audio output settings of the software you are using on your phone. Make sure the audio output is set to your speakerphone.