is it correct?

A] Antonio, are you there?
B] Yes, how come/whats up grandma?
A] In a few minutes I have a phone call but I dont know how to answer a phone call/ but I dont have any idea how to answer a phone call, do you mind explaining it to me?
B] No problem
A] Thank you, so what do I do first?
B] Hmm ok I will call you to show you how to answer my phone call, okay?
A] Ok
B] Thats easy. You just need to touch this button green, then you move it to the right, is it clear so far?
A] I think so
B] After that you just need to talk and the person on the other side is going to talk to you
A] Oh that's so easy! So first I touch this button green,right?
B] Correct!
A] Then I move it to the right, like this?
B] Yes, now you are ready to have a phone call whenever you want and to whoever you want
A] Thank you so much!
B] You're welcome