It rings on their phone. In your voice.
Papa doesn't read notifications. So it rings like an alarm, full screen, even on silent, and he hears you, in the way you talk at home. Hindi, English or both.
A WhatsApp message gets read later. An alarm he set himself gets swiped. Your voice gets answered.
“Papa, BP ki tablet ka time ho gaya.”
“Papa, tablet abhi tak nahi li? Le lo na.”
“Papa. Tablet. Abhi, please.”