Latest questions about "message sending"

When I am sending the message to the sign, I receive the message: Connected, message sent, disconnected, update successful. Is this normal? Because the message is not showing up on the sign.

I sent a message last night. It wasn't delivered and than I deactivated my account. I was wondering if I install Viber and create an account again today or tomorrow, will the message be sent then?

If I send someone a snap message and it says "Pending" after I sent them a request, and the message totally doesn't show up anymore what does that mean?

How do I know if the person has read my message?

Can I cancel a message that has been sent but wasn't delivered?

When Siron releases a message received from an Alliance Access, does it have the possibility to transfer the details of that message (operator user or unit) to send it to a specific printer or...

Why does magicJack not work to send or receive faxes? It does receive calls when hooked up to fax phone.