#5659 Listening to the Speaker?

Horav Aharon Miller Shlit’a maintains that although it seems for many a common and usual practice, it is incorrect and prohibited to do. One must tell and warn the person on the phone with you, that others may be listening to the conversation.

Rabbi A. Bartfeld as revised by, Horav Yaakov Hirschman, Horav Dovid Pam, Horav Aharon Miller, Horav Chanoch Ehrentreu and Horav Kalman Ochs Shlit’a