1. Make sure you're wearing the earbuds in the correct position so that the mic is directed towards your mouth.

2. Make sure your earbuds are connected to your device and adjust the volume on your device until you hear the voice.

3. When using two earbuds for calls, please make sure to talk using the right earbud as only that mic works for calls when in stereo mode.

4. If you make a call via an app, please check if the internet is good enough or if you have the correct settings on your device. 

5. As Life Note E has AI noise reduction for calls, the volume of your voice may be lower in noisy environments.