How to block a contact?
Android:
WhatsApp opens and sees Chats screen.
touch the "menu button"> Settings> Contacts> Contacts blocked
right upper corner, tap the Add icon blocked contacts
seeks contact and ready
Blackberry:
WhatsApp open and go to the Settings tab, then select Contacts Blocked to manage your list of blocked contacts.
select the contact and ready
iPhone:
opens WhatsApp> Settings> Chat> Blocked
press the "+" button to add contacts from your address book to the list of blocked contacts
pula "fact" when finished
Windows Phone:
WhatsApp open and go to the screen chats
press the three dots in the lower right corner of the screen
select Settings
Blocked press
press "+" TO select the contact and ready
If you want to unblock a contact, just follow the same steps and when you play the passage of "lock", do the reverse.