When dealing with a very angry customer , how do you handle such situation on the phone?

you should not answer them in a polite way at first,, but eventually you should calm them down and should make them happy before ending the communication,, more polite we behave they may step upon our head,, so we should no give them that chance,, face them with knowledge and good charactor

1. Listen to him and always use polite words as excuses me sir\\madam when you want to talk and also wrds like i understand.After the conversation just apologize and say thank you.

Ask him, 'is there any problem at home or office'? Consult his personal problems for a second or two, surely there will be some kind of external problem.

customer is king when he purchases from us,so we have to keep patience and slowly have to convince them

Listen to him until he allow me to speak