Open WhatsApp.
 It's the green app with a white phone and chat bubble icon.

  • If this is your first time opening WhatsApp, you'll need to set up whatsapp on your android phone.

Tap == 
This button is in the top-right corner of the screen.

  • If WhatsApp opens to a conversation, first tap the back button in the top-left corner of the screen.

Tap Settings.
 It's at the bottom of the drop-down menu here.

Tap Account.
 It's near the top of the page.

Tap Privacy.
 This option is at the top of the "Account" page.

Tap the checkbox to the right of Read receipts. This option is near the bottom of the page. Un-checking the Read receipts box will both disable read receipts in non-group conversations and prevent the blue "Message Seen" ticks from appearing in your chats.

  • Disabling the read receipts in conjunction with the last seen feature will allow you to read messages without the other person in your chat knowing.

  • You won't be able to see when others have read your WhatsApp messages if you disable read receipts.