How do you say 'call' in Português?
There are many meanings for the word call, so I would like to know which verb to use in which context.

Please give me a call.
I will call you tonight.
Which verb would we use for these two phrases? ligar? telefonar?

Please call me Ramon.
Which verb would we use here? Chamar?

Thank you.
Furthermore I would like to ask.. how do you say 'major' and 'minor' in Portuguese? Academic Major's and Minors, I mean. For instance, I majored in Linguistics, I had a minor in French. Which words would you use for that in Portuguese?

Obrigado!

Question

How do you say 'call' in Português?
There are many meanings for the word call, so  I would like to know which verb to use in which context.

Please give me a call.
I will call you tonight.
Which verb would we use for these two phrases? ligar? telefonar?

Please call me Ramon.
Which verb would we use here? Chamar?

Thank you.
Furthermore I would like to ask.. how do you say 'major' and 'minor' in Portuguese? Academic Major's and Minors, I mean. For instance, I majored in Linguistics, I had a minor in French. Which words would you use for that in Portuguese?

Obrigado!

Answer

Please give me a call - Por favor, ligue-me! Por favor, telefone para mim! 
I will call you tonight.- Eu telefonarei/ligarei para você a noite
You can to use both ligar and telefonar

Please call me Ramon - Por favor me chame de Ramon

Major = Principal/Maior
Minor = Secundário/Menor

A Major is the field in which a student focuses during the course of his/her ... A Minor is a secondary concentration of courses that often complements the Major.

I majored in Linguistics, I had a minor in French
Me graduei em Linguistica, com especialização em Francês!
Sou formado em Linguística, com habilitação em Francês!

Answer

Please give me a call. - Por favor, me liga.
I will call you tonight. - Vou te ligar hoje à noite.

Please call me Ramon. - Por favor, me chame de Ramon.

As for Major/Minor we don't have this system here in Brazil, let's wait for what the others will say! :)

Answer

Just keep in mind that Celso's translation is conversational while Claudiano's is a bit formal.