CALL BACK / GET BACK TO (SOMEONE)
stop talking on the phone
PUT (A CALL) THROUGH
connect one caller to another
wait
talk louder
HOLD ON / HANG ON
SWITCH OFF / TURN OFF
PICK UP
GET OFF (THE PHONE)
to be connected to someone on the phone
SPEAK UP
answer a call, lift the receiver to take a call
GET THROUGH
HANG UP
deactivate (a mobile phone)
put the receiver down
return someone’s call