Android users can significantly improve call sound quality through several built-in phone settings and features, addressing a common frustration with unclear audio during calls. The article provides step-by-step guidance on enabling these improvements without requiring hardware changes or professional assistance.

The main techniques include enabling VoLTE (Voice over LTE), which routes calls through faster 4G networks for clearer HD voice; activating Wi-Fi calling to send voice data through home or office networks rather than cellular networks; and using noise-filtering features such as Clear Calling on Pixel phones or Mic mode on Samsung devices. Whilst overall call quality depends partly on the other person's signal strength and environment, users can control multiple factors on their own device to significantly enhance audio clarity.