Problem phenomenon:
In a quiet environment, the earpiece may have a current sound when making a call and listening to social apps' voice messages.
Solutions:
In a quiet environment, when the screen is interfered with by the signal, there will be a slight noise. If the ear is close to the receiver, a weak current sound may be heard. It is a normal phenomenon. This phenomenon is not a hardware problem of the phone. Don't worry, thank you.
