I will call you, come sì dice?
Hi guys.

1) To say "I will call you later" is it right to say "ti chiamo a dopo"?

Or..would it be necessary to use the future tense "ti chiamerò a dopo"?

2) are there other frases that are not necessarily in line with English word for word while talking on the telephone or the surrounding subject?

Question

I will call you, come sì dice?
Hi guys.

1) To say "I will call you later" is it right to say "ti chiamo a dopo"?

Or..would it be necessary to use the future tense "ti chiamerò a dopo"?

2) are there other frases that are not necessarily in line with English word for word while talking on the telephone or the surrounding subject?

Answer

Usually we say:
/ti chiamo piu` tardi/
/dopo/ is intended to be used when there is a specification, like:
- ti chiamo dopo cena.
- ti chiamiamo dopo che Giovanni e` arrivato.

Answer

Hi Juha,
it's actually easier: "Ti chiamo dopo" 
you don't need to use the future tense.

you may find useful the following link:
https://it.speaklanguages.com/inglese/frasi/usare-il-telefono

Ciao
marco