ring back
Verb
Meaning
To return a phone call.
John called. He asked for you to ring him back as soon as you arrived.
To make another phone call to the same person.
I had to ring you back because I forgot to ask you something important.
Synonyms
Examples
During the message, there will be frequent instructions to 'ring back in the event of problems'.
Harvey is released and given his ring back, after it has been examined; he is told that his friend has died of "heart failure."