Computer fetion

My mother and sister both have mobile phones, but I don't. It's very troublesome to contact them and send text messages during the day.

Then my sister said that I could download a computer version of Fetion on my computer, so that I could send short messages to their mobile phones.

I downloaded Fetion 28 yesterday, but some problems have not been clarified.

1. Can the computer version of Fetion send short messages to your mobile phone?

because I don't have a mobile phone, I want to register with my mother's mobile phone number, but if I want to send a message to my mother by using the computer version of Fetion, isn't it equivalent to my mother sending a message to herself by using her mobile phone number? Can my mother receive it?

A: Yes.

2. How much does Fetion charge?

use my mother's mobile phone number to register the computer version of Fetion. So will my mother's mobile phone fee increase here? Or will my computer network fee increase?

a: if you don't have a member and don't charge, your computer won't add any fees.

3. If there is no Fetion on your mobile phone, can you receive the short message I sent?

there should be a fetion on my sister's mobile phone, but there seems to be no fetion on my mother's mobile phone. Can she get the text message I sent?

a: you don't have to use fetion if you can, but if you don't reply, you need to pay by SMS.

4. Should the reply SMS be sent to my fetion or my mobile phone?

because I want to register Fetion with my mother's mobile phone number. Then, I sent a reply to the short message. Is this reply sent to my computer by Fetion or to my mother's mobile phone?

a: if the computer fetion is open, it means that the computer fetion is not open, or it is on the mobile phone.

premise: everyone should be friends with each other.