Advice PLEASE

Any advice on staying a relationship where you have mad if clear to your partner that whenever he is mad you don’t like that he hangs up the phone?

I spoke to my man about this particular issue and I don’t like it because it dismissive and disrespectful. We agreed he wouldn’t do it again.

Recently he did it again and I’m at the point where I don’t have the strength to be explaining these common things to a grown man.

What are your thoughts on the situation and on hanging up the phone in general?