Looking for a job, I said I would give an answer the next day, but I didn't call. How should I ask him?

First, send a text message, ask politely, or send an email. Maybe he forgot, maybe he refused you, but sending text messages and emails can avoid the embarrassment caused by direct refusal.

Then, if you can't get information from the front, just ask, remember to be polite and kind, otherwise people will forget, but you really don't want you because you are impolite.

Finally, don't lose your manners and leave a bad impression on the other party when you contact by phone. The world is too small, we will always meet each other. If you fall behind, it will be bad for your future employment.

Remember to contact, for example, my classmate passed the interview in the local taxation bureau and said to contact in half a month. But I didn't see the notice for more than half a month, and I didn't know it was too long until I called. People forgot to arrange, which led my classmates to prepare for job hunting again.