Viber question

Hi everyone.I am searching for the AndroidPIT Viber app profile page ,but couldn' t find it.Can someone tell me how and where to find it?
I have also the following question and if someone knows the answer I would very much appreciate it.

"If someone with whom I was in contact and could see his last seen status being updated ,decides to hide his online status what will I see after that in exchange? Will I see the last seen status from the moment he disabled online status or nothing at all? "
Thank you