Latest questions about "contact list"

When I make a Viber call I don't hear the ringing anymore. The second issue is I now have all my phone contacts showing in my viber contact list whether they are on Viber or not and it's frustrating.

If I add someone on Viber, do I show up in their phone's contacts?

In my phone contact list I can see that the contact is using Viber. But in my Viber contact list I cannot see his/her Viber icon although I see other contacts Viber icons.

What does it mean, when I have no status, nothing (no online, no last time online) on my contact in Viber?

Can anyone tell me if I add someone on my Viber contact list, will they get notified? They don't have my phone number.

I'm using Viber and I noticed today that I am missing one contact from my Viber contacts list, although the contact is still in my phone contacts list.

If I have a number on my contacts and it shows that she/he's using Viber, too, does it mean that she/he can see me on his/her contacts?

If someone deactivates his Viber account, does he disappear immediately from my Viber contact list?

Let's say Person A and Person B both have Viber. Person A has Person B's number but Person A does not know if Person B still has Person A's number, but Person B appears to be active on Viber.

If a contact was showing as last active 12/10/13 but then since December is consistently online - can this be correct if the person hasn't actually Viber since 12/10/13 activated?