Whatsapp help? Any help appreciated!?

[Sharat]

No..if you save a contact in your phone then you will see that contact in your whatsapp list(if that person is on whatsapp)..this does not mean that person saved your number too..you can see anyone's last seen information if you have that persons number..he/she will never even know if you're checking when they were online..whatsapp doesn't notify a person if someone has their phone number..you can check their profile picture too..they will never know..the only way that they will get to know is when you send them a message! Then they can see your phone number too and then when they checkout your 'last seen' you will not know either..
Btw they can block you too..by blocking you can never send them a message but even then you can check their profile..
So..its just like facebook but you need to have their phone number in order to see their profile..