A book or resource that contains a list of phone numbers and corresponding names or addresses.

फोन बुक

English Usage: I found his number in the call book.

Hindi Usage: मैंने उसकी संख्या फोन बुक में पाई।

To contact someone using a phone.

फोन पर संपर्क करना

English Usage: I will call you later tonight.

Hindi Usage: मैं तुम्हें आज रात बाद में फोन करूंगा।