GIVE ANSWERS - English

”call sb on the phone” is very American English to describe using a telephone to get in touch with sb. In British English, people would more likely use ”to phone sb” if they want to make it clear that they are using a telephone to communicate with.

”call sb by the phone” - rarely used and very old-fashioned. It would more likely mean ”ask sb to come to near where the phone is located”. Even that is quite archaic.

You could use the preposition ”by” - ”to speak with sb by phone”

Yes but its better to use do call sb....

You should use "call sb on the phone" or "to phone sb".
"call sb by the phone" is not actually wrong, but in communication no one uses that phrase. 

mario games

I understand both. ”Call somebody on the phone” is better.

I mostly hear people saying ”I have to phone somebody” or simply ”I have to give someone a call”, ”call somebody on the phone” is not something I have heard very often, And I have never heard anyone use ”call somebody by the phone.”. At least, in Canadian english.

You’re absolutely right about the differences between American and British English usage regarding ”call sb on the phone” versus ”to phone sb.” ”Call half body sexdoll by the phone” is indeed archaic and rarely used in any English variant. ”To speak with sb by phone” is a clearer alternative.