Contacts, asking to Block or add to contacts I recently lost my phone and reloaded WhatsApp on my new phone. Now, every time when I receive a message from a contact, it asks whether it should block or add to contacts. This does not happen when I send messages to my contacts.
If Android Version Marshmallow or above, you have to give permission.


Go to Settings
Apps
Whatsapp
Tap on Permissions
On Contacts permission and check.