up – to end a phone conversation.
cut off – when a phone connection stops working.
call back – to telephone someone again, or to telephone someone who telephoned you earlier.
dial – to choose the numbers you want on your phone so you can phone someone.
a country code – the numbers at the beginning of a phone number that you need to phone someone outside your country.
an engaged tone – the noise you hear on your phone when the person you are trying to phone is phoning someone else.
tinkle – a telephone call. 