get

Yes, that is correct. You are asking the person to answer the phone.

The same with "someone's at the door.....will you get it please"?

All the students got me in my new clothes when I entered the classroom.

We usually get him for his ugly faces.

Are these sentences correct?

[I meant, by the first sentence, that, "All the students looked at me and laughed at me when I entered the classroom with my new dress".

I meant, by the second sentence, that, "We usually laugh a

No, I don't agree with the use of 'got' for 'laugh at'. Where did you get this meaning from?

Thank you Nona the Brit.

I got it from Cambridge Dictionary.

get (LOOK AT) http://dictionary.cambridge.org/define.asp?dict=CALD&key=32704&ph=on
verb [T not continuous] US gotten INFORMAL
to look at or notice someone, and usually laugh at them:
Get h

Ah right, yes. OK it is used sometimes in this meaning (over here as well as in the US) but not in the way you are trying. It's a nasty comment that people say and it always takes the form 'Get him' or 'Get her' or 'Get you' in a sarcastic sort of voice. You don't just use 'get' in a sentence to mean 'laugh at'. It's always dialogue/speech. It's a way of sneering at someone.

Thank you Nona-the-Brit.

Then, do you agree that my sentences are grammatically and semantically correct? Or Is it need corrections?

No, they are not correct. As I said, get can only be used in this way as a sarcastic comment in speech or reported speech.